MACOM Technology Solutions (MTSI) 10-Q 6 Aug 19 2019 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Jun. 28, 2019	Aug. 02, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 28, 2019
Document Transition Report	false
Entity File Number	001-35451
Entity Registrant Name	MACOM Technology Solutions Holdings, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-0306875
Entity Address, Address Line One	100 Chelmsford Street
Entity Address, City or Town	Lowell
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01851
City Area Code	978
Local Phone Number	656-2500
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	MTSI
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		66,051,693
Entity Central Index Key	0001493594
Amendment Flag	false
Current Fiscal Year End Date	--09-27
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2019

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 28, 2019	Sep. 28, 2018
Current assets:
Cash and cash equivalents	$ 85,265	$ 94,676
Short-term investments	100,520	98,221
Accounts receivable (less allowances of $4,919 and $6,795, respectively)	68,084	97,375
Inventories	110,546	122,837
Income tax receivable	16,778	17,601
Assets held for sale	5,050	4,840
Prepaid and other current assets	26,846	23,311
Total current assets	413,089	458,861
Property and equipment, net	139,380	149,923
Goodwill	314,687	314,076
Intangible assets, net	193,758	512,785
Deferred income taxes	2,303	2,272
Other investments	27,157	31,094
Other long-term assets	13,953	13,484
TOTAL ASSETS	1,104,327	1,482,495
Current liabilities:
Current portion of lease payable	1,219	467
Current portion of long-term debt	6,885	6,885
Accounts payable	38,849	41,951
Accrued liabilities	45,303	49,945
Contract liabilities	2,355	7,757
Total current liabilities	94,611	107,005
Lease payable, less current portion	28,848	29,023
Long-term debt, less current portion	656,046	658,372
Warrant liability	7,341	13,129
Deferred income taxes	455	389
Other long-term liabilities	18,031	5,902
Total liabilities	805,332	813,820
Stockholders’ equity:
Common stock	66	65
Treasury stock, at cost	(330)	(330)
Accumulated other comprehensive income	4,899	2,188
Additional paid-in capital	1,096,650	1,074,728
Accumulated deficit	(802,290)	(407,976)
Total stockholders’ equity	298,995	668,675
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,104,327	$ 1,482,495

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 28, 2019	Sep. 28, 2018
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 4,919	$ 6,795

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Income Statement [Abstract]
Revenue	$ 108,306	$ 137,872	$ 387,460	$ 419,210
Cost of revenue	74,478	89,703	219,678	244,486
Gross profit	33,828	48,169	167,782	174,724
Operating expenses:
Research and development	42,708	48,240	128,593	131,487
Selling, general and administrative	41,920	42,471	126,437	119,393
Impairment charges	264,086	0	264,086	6,575
Restructuring charges	8,887	102	17,047	6,302
Total operating expenses	357,601	90,813	536,163	263,757
Loss from operations	(323,773)	(42,644)	(368,381)	(89,033)
Other (expense) income
Warrant liability gain (expense)	1,927	(6,728)	5,788	24,895
Interest expense, net	(8,967)	(8,039)	(27,142)	(23,249)
Other income (expense)	4,777	(37,281)	(4,233)	(41,413)
Total other expense, net	(2,263)	(52,048)	(25,587)	(39,767)
Loss before income taxes	(326,036)	(94,692)	(393,968)	(128,800)
Income tax (benefit) expense	(1,322)	(9,482)	346	(11,153)
Loss from continuing operations	(324,714)	(85,210)	(394,314)	(117,647)
Loss from discontinued operations	0	(220)	0	(5,837)
Net loss	$ (324,714)	$ (85,430)	$ (394,314)	$ (123,484)
Basic loss per share:
Loss from continuing operations	$ (4.93)	$ (1.31)	$ (6.01)	$ (1.82)
Loss from discontinued operations	0	0	0	(0.09)
Loss per share - basic	(4.93)	(1.32)	(6.01)	(1.91)
Diluted loss per share:
Loss from continuing operations	(4.95)	(1.31)	(6.09)	(2.19)
Loss from discontinued operations	0	0	0	(0.09)
Loss per share - diluted	$ (4.95)	$ (1.32)	$ (6.09)	$ (2.28)
Shares used:
Basic (in shares)	65,858	64,920	65,555	64,598
Diluted (in shares)	65,945	64,920	65,722	65,198

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (324,714)	$ (85,430)	$ (394,314)	$ (123,484)
Unrealized gain (loss) on short-term investments, net of tax	105	59	455	(455)
Foreign currency translation gain (loss), net of tax	996	(3,475)	2,256	1,235
Other comprehensive income (loss), net of tax	1,101	(3,416)	2,711	780
Total comprehensive loss	$ (323,613)	$ (88,846)	$ (391,603)	$ (122,704)

Condensed Consolidated Statem_3

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Accumulated Other Comprehensive Income	Additional Paid-in Capital	Accumulated Deficit
Balance at beginning of period (in shares) at Sep. 29, 2017		64,279,000
Balance at beginning of period at Sep. 29, 2017	$ 777,374	$ 64	$ (330)	$ 2,977	$ 1,041,644	$ (266,981)
Balance at beginning of period (in shares) at Sep. 29, 2017			(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		22,000
Stock options exercises	65				65
Vesting of restricted common stock and units (in shares)		883,000
Vesting of restricted common stock and units	1	$ 1
Issuance of common stock pursuant to employee stock purchase plan (in shares)		305,000
Issuance of common stock pursuant to employee stock purchase plan	6,879				6,879
Shares repurchased for stock withholdings on restricted stock awards (in shares)		(307,000)
Shares repurchased for tax withholdings on equity awards	(6,673)				(6,673)
Share-based compensation	24,095				24,095
Other comprehensive income, net of tax	780			780
Net loss	(123,484)					(123,484)
Balance at end of period (in shares) at Jun. 29, 2018		65,182,000
Balance at end of period at Jun. 29, 2018	679,037	$ 65	$ (330)	3,757	1,067,028	(391,483)
Balance at end of period (in shares) at Jun. 29, 2018			(23,000)
Balance at beginning of period (in shares) at Mar. 30, 2018		64,728,000
Balance at beginning of period at Mar. 30, 2018	758,265	$ 65	$ (330)	7,173	1,057,410	(306,053)
Balance at beginning of period (in shares) at Mar. 30, 2018			(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		2,000
Stock options exercises	7				7
Vesting of restricted common stock and units (in shares)		383,000
Issuance of common stock pursuant to employee stock purchase plan (in shares)		191,000
Issuance of common stock pursuant to employee stock purchase plan	3,684				3,684
Shares repurchased for stock withholdings on restricted stock awards (in shares)		(122,000)
Shares repurchased for tax withholdings on equity awards	(2,827)				(2,827)
Share-based compensation	8,754				8,754
Other comprehensive income, net of tax	(3,416)			(3,416)
Net loss	(85,430)					(85,430)
Balance at end of period (in shares) at Jun. 29, 2018		65,182,000
Balance at end of period at Jun. 29, 2018	679,037	$ 65	$ (330)	3,757	1,067,028	(391,483)
Balance at end of period (in shares) at Jun. 29, 2018			(23,000)
Balance at beginning of period (in shares) at Sep. 28, 2018		65,202,000
Balance at beginning of period at Sep. 28, 2018	$ 668,675	$ 65	$ (330)	2,188	1,074,728	(407,976)
Balance at beginning of period (in shares) at Sep. 28, 2018			(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)	22,795	23,000
Stock options exercises	$ 46				46
Vesting of restricted common stock and units (in shares)		632,000
Vesting of restricted common stock and units	1	$ 1
Issuance of common stock pursuant to employee stock purchase plan (in shares)		421,000
Issuance of common stock pursuant to employee stock purchase plan	5,585				5,585
Shares repurchased for stock withholdings on restricted stock awards (in shares)		(223,000)
Shares repurchased for tax withholdings on equity awards	(3,872)				(3,872)
Share-based compensation	20,163				20,163
Other comprehensive income, net of tax	2,711			2,711
Net loss	(394,314)					(394,314)
Balance at end of period (in shares) at Jun. 28, 2019		66,055,000
Balance at end of period at Jun. 28, 2019	298,995	$ 66	$ (330)	4,899	1,096,650	(802,290)
Balance at end of period (in shares) at Jun. 28, 2019			(23,000)
Balance at beginning of period (in shares) at Mar. 29, 2019		65,723,000
Balance at beginning of period at Mar. 29, 2019	617,025	$ 66	$ (330)	3,798	1,091,067	(477,576)
Balance at beginning of period (in shares) at Mar. 29, 2019			(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		11,000
Stock options exercises	22				22
Vesting of restricted common stock and units (in shares)		87,000
Vesting of restricted common stock and units	0	$ 0
Issuance of common stock pursuant to employee stock purchase plan (in shares)		265,000
Issuance of common stock pursuant to employee stock purchase plan	3,193				3,193
Shares repurchased for stock withholdings on restricted stock awards (in shares)		(31,000)
Shares repurchased for tax withholdings on equity awards	(446)				(446)
Share-based compensation	2,814				2,814
Other comprehensive income, net of tax	1,101			1,101
Net loss	(324,714)					(324,714)
Balance at end of period (in shares) at Jun. 28, 2019		66,055,000
Balance at end of period at Jun. 28, 2019	$ 298,995	$ 66	$ (330)	$ 4,899	$ 1,096,650	$ (802,290)
Balance at end of period (in shares) at Jun. 28, 2019			(23,000)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (394,314)	$ (123,484)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and intangibles amortization	84,612	83,695
Share-based compensation	20,163	24,095
Warrant liability gain	(5,788)	(24,895)
Acquired inventory step-up amortization	0	224
Deferred financing cost amortization	3,046	3,572
Loss on disposition of business	0	(34,046)
Deferred income taxes	59	(8,502)
Restructuring and impairment related charges	272,873	9,143
Loss on minority equity investment	3,937	7,241
Changes in assets held for sale from discontinued operations	0	(6,266)
Other adjustments, net	395	936
Change in operating assets and liabilities:
Accounts receivable	29,291	34,769
Inventories	12,298	(1,617)
Prepaid expenses and other assets	1,350	(3,682)
Accounts payable	(3,888)	(11,049)
Accrued and other liabilities	3,164	(1,952)
Income taxes	1,079	(5,058)
Net cash provided by operating activities	28,277	11,216
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of businesses, net	(375)	0
Purchases of property and equipment	(31,905)	(39,443)
Proceeds from sales and maturities of short-term investments	155,281	85,422
Purchases of short-term investments	(156,061)	(99,363)
Purchases of other investments	0	(5,000)
Sale of business and assets	0	5,000
Proceeds associated with discontinued operations	0	(263)
Net cash used in investing activities	(33,060)	(53,647)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments of financing costs	0	505
Proceeds from stock option exercises and employee stock purchases	5,631	6,944
Payments on notes payable	(5,163)	(5,163)
Payments of capital leases and assumed debt	(809)	(571)
Repurchase of common stock - tax withholdings on equity awards	(3,872)	(6,673)
Proceeds from financing obligation	0	4,000
Payments of contingent consideration and other	579	478
Net cash used in financing activities	(4,792)	(2,446)
Foreign currency effect on cash	164	41
NET CHANGE IN CASH AND CASH EQUIVALENTS	(9,411)	(44,836)
CASH AND CASH EQUIVALENTS — Beginning of period	94,676	130,104
CASH AND CASH EQUIVALENTS — End of period	$ 85,265	$ 85,268

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Jun. 28, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Unaudited Interim Financial Information —The accompanying unaudited, condensed consolidated financial statements have been prepared according to the rules and regulations of the United States (the “U.S.”) Securities and Exchange Commission (the “SEC”) and, in the opinion of management, reflect all adjustments, which include normal recurring adjustments, necessary for a fair statement of the condensed consolidated balance sheets, condensed consolidated statements of operations, condensed consolidated statement of comprehensive loss, condensed consolidated statements of stockholders' equity and condensed consolidated statements of cash flows of MACOM Technology Solutions Holdings, Inc. (“MACOM”, the “Company”, “us”, “we” or “our”) for the periods presented. We prepare our interim financial information using the same accounting principles we use for our annual audited consolidated financial statements. Certain information and note disclosures normally included in the annual audited consolidated financial statements have been condensed or omitted in accordance with prescribed SEC rules. We believe that the disclosures made in our condensed consolidated financial statements and the accompanying notes are adequate to make the information presented not misleading. The consolidated balance sheet at September 28, 2018 is as reported in our audited consolidated financial statements as of that date. Our accounting policies are described in the notes to our September 28, 2018 consolidated financial statements, which were included in our Annual Report on Form 10-K for our fiscal year ended September 28, 2018 filed with the SEC on November 16, 2018 . We recommend that the financial statements included in this Quarterly Report on Form 10-Q be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for our fiscal year ended September 28, 2018 . Principles of Consolidation— We have one reportable segment, semiconductors and modules. The accompanying consolidated financial statements include our accounts and the accounts of our majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. We have a 52- or 53-week fiscal year ending on the Friday closest to the last day of September. The fiscal years 2019 and 2018 include 52 weeks. To offset the effect of holidays, for fiscal years in which there are 53 weeks, we include the extra week arising in such fiscal years in the first quarter. Use of Estimates —The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities during the reporting periods, the reported amounts of revenue and expenses during the reporting periods, and the disclosure of contingent assets and liabilities at the date of the financial statements. On an ongoing basis, we base estimates and assumptions on historical experience, currently available information and various other factors that management believes to be reasonable under the circumstances. Actual results may differ materially from these estimates and assumptions. Revenue Recognition— Substantially all of our revenue is derived from sales of high-performance radio frequency ("RF"), microwave, millimeterwave and lightwave semiconductor solutions into three primary markets: Telecom, Data Centers and Industrial and Defense ("I&D"). Revenue is recognized when a customer obtains control of products or services, in an amount that reflects the consideration which we expect to receive in exchange for those goods or services. To determine revenue recognition for arrangements within the scope of Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers , we perform the following five steps: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when (or as) we satisfy performance obligations. Sales, value add and other taxes collected on behalf of third parties are excluded from revenue. Our revenue arrangements do not contain significant financing components. Contracts with our customers principally contain only one distinct performance obligation, which is the sale of products. However, due to multiple products potentially being sold on a single order, we are required to allocate consideration based on the estimated relative standalone selling prices of the promised products. Periodically, we enter into non-product development and license contracts with certain customers. We generally recognize revenue from these contracts as services are provided based on the terms of the contract. Revenue is deferred for amounts billed or received prior to delivery of the services. Certain contracts may contain multiple performance obligations for which we allocate revenue to each performance obligation on a relative stand-alone selling price. Our product revenue is recognized when the customer obtains control of the product or services, which generally occurs at a point in time, and is based on the contractual shipping terms of a contract. Non-product revenue is generally recognized over time. For each contract, the promise to transfer the control of the products or services, each of which is individually distinct, is considered to be the identified performance obligation. We provide an assurance type warranty which is not sold separately and does not represent a separate performance obligation. Therefore, we account for such warranties under ASC 460, Guarantees , and the estimated costs of warranty claims are generally accrued as cost of revenue in the period the related revenue is recorded. We have agreements with certain customers which may include certain rights of return and pricing programs, including returns for aged inventory, stock rotation and price protection which affect the transaction price. Sales to these customers and programs offered are in accordance with terms set forth in written agreements, which require us to assess the potential revenue effects of this variable consideration utilizing the expected value method. Variable consideration is included in the transaction price if, in our judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. As such, revenue on sales to customers that include rights of return and pricing programs are recorded net of estimated variable consideration, utilizing the expected value method based on historical sales data. We believe that the judgments and estimates we utilize are reasonable based upon current facts and circumstances, however utilizing different judgments and estimates could result in different amounts. Practical Expedients and Elections — ASC 606 requires that we disclose the aggregate amount of transaction price that is allocated to performance obligations that have not yet been satisfied as of the reporting periods presented. The guidance provides certain practical expedients that limit this requirement and, therefore, we do not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which revenue is recognized at the amount to which we have the right to invoice for services performed. We have elected not to disclose the aggregate amount of transaction prices associated with unsatisfied or partially unsatisfied performance obligations for contracts where these criteria are met. Our policy is to capitalize any incremental costs incurred to obtain a customer contract, only to the extent that the benefit associated with the costs is expected to be longer than one year. Capitalizable contract costs were not significant both at the date of adoption and as of June 28, 2019 . We account for shipping and handling activities related to contracts with customers as costs to fulfill the promise to transfer the associated products. When shipping and handling costs are incurred after a customer obtains control of the products, we have elected to account for these as costs to fulfill the promise and not as a separate performance obligation. Shipping and handling costs associated with the distribution of products to customers are recorded in costs of revenue generally when the related product is shipped to the customer. Recent Accounting Pronouncements —Our Recent Accounting Pronouncements are described in the notes to our September 28, 2018 consolidated financial statements, which were included in our Annual Report on Form 10-K for our fiscal year ended September 28, 2018 . Pronouncements Adopted in Fiscal Year 2019 We adopted Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers, on September 29, 2018. The FASB subsequently issued several amendments and updates to the new revenue standard. We refer to ASU 2014-09 and its related ASUs as "ASC 606". We applied ASC 606 using the modified retrospective method and elected to apply this initial application of the standard only to contracts that are not completed at the date of initial application. We have analyzed this effect and found the adoption of the new guidance did not have a material impact on our consolidated financial statements as of the adoption date. The reported results for our fiscal year 2019 reflect the application of ASC 606 guidance while the reported results for our fiscal year 2018 were prepared under the guidance of ASC 605, Revenue Recognition . We adopted ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, on September 29, 2018. In February 2018, the FASB issued further amendments to this guidance. This update made amendments to the guidance in GAAP on the classification and measurement of financial instruments. The new standard significantly revised an entity's accounting related to (1) the classification and measurement of investments in equity securities and (2) the presentation of certain fair value changes for financial liabilities measured at fair value. It also amended certain disclosure requirements associated with the fair value of financial instruments. The adoption of this update did not have a material impact on our consolidated financial statements and related disclosures. We adopted ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments, on September 29, 2018. This update addressed debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, distributions received from equity method investees, beneficial interests in securitization transactions and separately identifiable cash flows and application of the predominance principle. The adoption of this update did not have a material impact on our consolidated financial statements and related disclosures. We adopted ASU 2016-16, Intra-Entity Transfers of Assets Other Than Inventory, on September 29, 2018. This update amended the guidance on recognizing the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the amendment eliminated the exception for an intra entity transfer of an asset other than inventory. The adoption of this updated standard did not have a material impact on our consolidated financial statements and related disclosures. Pronouncements for Adoption in Subsequent Periods In February 2016, the FASB issued ASU 2016-02, Leases ("ASC 842"). The FASB subsequently issued several amendments and updates to the new leasing standard. The new standard increases transparency and comparability among organizations by recognizing right-of-use assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. Under ASC 842, leases are classified as either operating or finance, based on criteria similar to current lease accounting, but without explicit bright lines. ASC 842 is effective for us as of September 28, 2019, and we intend to apply ASC 842 using the cumulative-effect adjustment on this date, with comparative periods presented in accordance with the previous guidance in ASC 840, Leases

Revenue (Notes)

Revenue (Notes)	9 Months Ended
	Jun. 28, 2019
Revenue [Abstract]
Revenue from Contract with Customer [Text Block]	. REVENUE Disaggregation of Revenue We disaggregate revenue from contracts with customers by markets and geography, as we believe it best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. The following tables present our revenue disaggregated by markets and geography (in thousands): Three Months Ended Nine Months Ended 6/28/2019 6/29/2018 6/28/2019 6/29/2018 Revenue by Market: Industrial & Defense $ 46,809 $ 48,399 $ 154,563 $ 132,994 Data Center 17,614 38,911 91,518 116,269 Telecom 43,883 50,562 141,379 169,947 Total $ 108,306 $ 137,872 $ 387,460 $ 419,210 Three Months Ended Nine Months Ended 6/28/2019 6/29/2018 6/28/2019 6/29/2018 Revenue by Geographic Region: United States $ 52,340 $ 67,861 $ 185,172 $ 197,540 China 27,451 39,016 104,491 115,068 Asia Pacific, excluding China (1) 16,371 17,795 60,384 64,028 Other Countries (2) 12,144 13,200 37,413 42,574 Total $ 108,306 $ 137,872 $ 387,460 $ 419,210 (1) Asia Pacific represents Taiwan, Japan, Singapore, India, Thailand, South Korea, Australia, Malaysia, New Zealand and the Philippines. (2) No international country or region represented greater than 10% of the total revenue as of the dates presented, other than China and the Asia Pacific region as presented above. Contract Balances We record contract assets or contract liabilities depending on the timing of revenue recognition, billings and cash collections on a contract-by-contract basis. Our contract liabilities primarily relate to deferred revenue, including advance consideration received from customers for contracts prior to the transfer of control to the customer, and therefore revenue is recognized upon delivery of products and services. The following table presents the changes in contract liabilities during the nine months ended June 28, 2019 (in thousands): June 28, 2019 September 28, 2018 $ Change % Change Contract liabilities $ 10,685 $ 7,757 $ 2,928 38 % As of June 28, 2019 , approximately $8.3 million of our contract liabilities were recorded as other long-term liabilities on our balance sheet with the remainder recorded as deferred revenue. The increase in contract liabilities during the nine months ended June 28, 2019 was primarily from the deferral of revenue for funds received prior to when certain of our customers obtain control of the product or services, partially offset by the March 29, 2019 recognition of $7.0 million associated with a license contract. During the three and nine months ended June 28, 2019

Discontinued Operations

Discontinued Operations	9 Months Ended
	Jun. 28, 2019
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	DISCONTINUED OPERATIONS Divested Business On May 10, 2018, we completed the sale and transfer of certain assets associated with our Japan-based long-range optical subassembly business (the “LR4 Business”), pursuant to an Asset Purchase and Intellectual Property License Agreement, dated April 30, 2018 (the “LR4 Agreement”). The LR4 Agreement provided that the buyer would pay us $5.0 million within 30 days following the closing of the transactions contemplated by the LR4 Agreement, provide us with the opportunity to supply components and pay us further amounts to be determined for inventory and fixed assets within 60 days of receipt of required Chinese government approvals. As of September 28, 2018, $7.4 million had been recorded as other current assets and $4.8 million had been recorded as assets held for sale, as the assets had not been transferred to the buyer as of September 28, 2018. As a result of the transaction, during fiscal year 2018 we recorded a loss on disposal of $34.3 million associated with the LR4 Business as other expense, comprised of expected proceeds of $17.2 million , subject to receipt of required Chinese government approvals, less the carrying value of assets sold, primarily including customer relationship intangible assets of $27.7 million , inventory of $13.7 million , fixed assets of $7.6 million and goodwill of $2.6 million . The transaction did not meet the criteria of discontinued operations. We also entered into a transition services agreement (the "LR4 TSA") with the buyer, pursuant to which we agreed to incur up to $2.0 million of operating expenses for certain ongoing administrative services to support the buyer for up to six months after the closing of the transaction. During the three and nine months ended June 28, 2019 , we have incurred no expenses associated with the LR4 TSA. During the three and nine months ended June 29, 2018, we incurred $0.4 million of expenses associated with the LR4 TSA. As of June 28, 2019, we have $14.0 million of receivables, net of a $0.3 million reserve, associated with the LR4 Agreement recorded as other current assets, which includes $11.9 million of additional consideration, net of tax, and $1.5 million associated with the LR4 TSA. Discontinued Operations On October 27, 2017, we entered into a purchase agreement to sell the Compute business. In consideration for the transfer and sale of the Compute business, we received an equity interest in the buyer, a privately held limited liability company ("Compute"), valued at approximately $36.5 million , and representing less than 20.0% of Compute's total outstanding equity. The operations of the Compute business were accounted for as discontinued operations through the date of divestiture. We also entered into a transition services agreement (the "Compute TSA"), pursuant to which we agreed to perform certain primarily general and administrative functions on Compute's behalf during a migration period and for which we are reimbursed for costs incurred. During the three months ended June 28, 2019 , we received no reimbursements under the Compute TSA. During the nine months ended June 28, 2019 , we received $0.1 million of reimbursements under the Compute TSA, which was recorded as a reduction of our general and administrative expenses. During the three and nine months ended June 29, 2018 , we received $1.0 million and $3.5 million , respectively, of reimbursements under the Compute TSA. The accompanying consolidated statements of operations include the following operating results related to these discontinued operations (in thousands): Three Months Ended Nine Months Ended June 29, 2018 June 29, 2018 Revenue $ — $ — Cost of revenue — (596 ) Gross profit — 596 Operating expenses: Research and development 175 4,873 Selling, general and administrative 45 1,560 Total operating expenses 220 6,433 Loss from operations (220 ) (5,837 ) Loss before income taxes (220 ) (5,837 ) Income tax provision — — Loss from discontinued operations $ (220 ) $ (5,837 ) Cash flow from operating activities (29 ) (10,356 )

Short Term Investments

Short Term Investments	9 Months Ended
	Jun. 28, 2019
Investments, Debt and Equity Securities [Abstract]
Investments	INVESTMENTS Our short-term investments are invested in corporate bonds and commercial paper, and are classified as available-for-sale. The amortized cost, gross unrealized holding gains or losses, and fair value of our investments by major investment type as of June 28, 2019 and September 28, 2018 are summarized in the tables below (in thousands): June 28, 2019 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 29,235 $ 128 $ (120 ) $ 29,243 Commercial paper 71,306 4 (33 ) 71,277 Total short-term investments $ 100,541 $ 132 $ (153 ) $ 100,520 September 28, 2018 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 28,731 $ — $ (460 ) $ 28,271 Commercial paper 69,966 — (16 ) 69,950 Total short-term investments $ 98,697 $ — $ (476 ) $ 98,221 The contractual maturities of available-for-sale investments were as follows (in thousands): June 28, 2019 September 28, 2018 Less than 1 year $ 73,078 $ 70,200 Over 1 year 27,442 28,021 Total short-term investments $ 100,520 $ 98,221 Available-for-sale investments are reported at fair value and as such, their associated unrealized gains and losses are reported as a separate component of stockholders’ equity within accumulated other comprehensive income. Other Investments — As of June 28, 2019 , we held two non-marketable equity investments classified as other long-term investments. One of these is an investment in a Series B preferred stock ownership of a privately held manufacturing corporation with preferred liquidation rights over other equity shares. As the equity securities do not have a readily determinable fair value and do not qualify for the practical expedient under ASC 820 we have elected to account for this investment at cost less any impairment. As of June 28, 2019 and September 28, 2018 , the cost of this investment was $5.0 million . We evaluate this investment for impairment at each balance sheet date, and through June 28, 2019 , no impairment has been recorded for this investment. In addition, we have a minority investment of less than 20.0% in the outstanding equity of Compute that was acquired in conjunction with the divestiture of the Compute business during the fiscal quarter ended December 29, 2017. We contributed net assets valued at approximately $36.5 million in exchange for this equity interest. This investment value is updated quarterly based on our proportionate share of the losses or earnings of Compute, as well as any changes in Compute's equity, utilizing the equity method. During the three and nine months ended June 28, 2019 we recorded income of $5.0 million and losses of $3.9 million , respectively, associated with this investment as other income (expense) in our consolidated statements of operations. During the three and nine months ended June 29, 2018 , we recorded losses of $3.1 million and $7.2 million , respectively, associated with this investment. As of June 28, 2019 and September 28, 2018 , the carrying value of this investment was $22.2 million and $26.1 million

Fair Value

Fair Value	9 Months Ended
	Jun. 28, 2019
Fair Value Disclosures [Abstract]
Fair Value	FAIR VALUE We group our financial assets and liabilities measured at fair value on a recurring basis in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are: Level 1 - Quoted prices in active markets for identical assets or liabilities. Level 2 - Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets with insufficient volume or infrequent transactions (less active markets), or model-driven valuations in which all significant inputs are observable or can be derived principally from, or corroborated with, observable market data. Level 3 - Fair value is derived from valuation techniques in which one or more significant inputs are unobservable, including assumptions and judgments made by us. Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis We measure certain assets and liabilities at fair value on a recurring basis such as our financial instruments and derivatives. There have been no transfers between Level 1, 2 or 3 assets or liabilities during the three and nine months ended June 28, 2019 . Assets and liabilities measured at fair value on a recurring basis consist of the following (in thousands): June 28, 2019 Fair Value Active Markets for Identical Assets (Level 1) Observable Inputs (Level 2) Unobservable Inputs (Level 3) Assets Money market funds $ 241 $ 241 $ — $ — Commercial paper 71,277 — 71,277 — Corporate bonds 29,243 — 29,243 — Total assets measured at fair value $ 100,761 $ 241 $ 100,520 $ — Liabilities Common stock warrant liability 7,341 — — 7,341 Total liabilities measured at fair value $ 7,341 $ — $ — $ 7,341 September 28, 2018 Fair Value Active Markets for Identical Assets (Level 1) Observable Inputs (Level 2) Unobservable Inputs (Level 3) Assets Money market funds $ 253 $ 253 $ — $ — Commercial paper 69,950 — 69,950 — Corporate bonds 28,271 — 28,271 — Total assets measured at fair value $ 98,474 $ 253 $ 98,221 $ — Liabilities Contingent consideration $ 585 $ — $ — $ 585 Common stock warrant liability 13,129 — — 13,129 Total liabilities measured at fair value $ 13,714 $ — $ — $ 13,714 As of June 28, 2019 and September 28, 2018 , the fair value of the common stock warrants has been estimated using a Black-Scholes option pricing model. The fair value of the contingent consideration liability was estimated based upon a risk-adjusted present value of the probability-weighted expected payments by us. Specifically, we considered base, upside and downside scenarios for the operating metrics upon which the contingent payments are to be based. Probabilities were assigned to each scenario and the probability weighted payments were discounted to present value using risk-adjusted discount rates. The quantitative information utilized in the fair value calculation of our Level 3 liabilities is as follows: Inputs Liabilities Valuation Technique Unobservable Input June 28, 2019 September 28, 2018 Contingent consideration Discounted cash flow Discount rate N/A 9.2% Probability of achievement N/A 90% Timing of cash flows N/A 1 month Warrant liability Black-Scholes model Volatility 73.4% 60.7% Discount rate 1.84% 2.81% Expected life 1.5 years 2.2 years Exercise price $14.05 $14.05 Stock price $15.13 $20.60 Dividend rate —% —% The changes in liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands): September 28, Net Realized/Unrealized Losses (Gains) Included in Earnings Purchases and Issuances Sales and Settlements June 28, Contingent consideration $ 585 $ 65 $ — $ (650 ) $ — Common stock warrant liability $ 13,129 $ (5,788 ) $ — $ — $ 7,341 September 29, Net Realized/Unrealized Gains Included in Earnings Purchases and Issuances Sales and Settlements June 29, Contingent consideration $ 1,679 $ (469 ) $ — $ (700 ) $ 510 Common stock warrant liability $ 40,775 $ (24,895 ) $ — $ — $ 15,880

Inventories

Inventories	9 Months Ended
	Jun. 28, 2019
Inventory Disclosure [Abstract]
Inventories	INVENTORIES Inventories, consist of the following (in thousands): June 28, September 28, Raw materials $ 60,958 $ 71,408 Work-in-process 13,949 13,466 Finished goods 35,639 37,963 Total inventory, net $ 110,546 $ 122,837

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
	Jun. 28, 2019
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consists of the following (in thousands): June 28, September 28, Construction in process $ 29,288 $ 49,661 Machinery and equipment 172,934 174,638 Leasehold improvements 13,449 14,984 Furniture and fixtures 3,683 2,306 Computer equipment and software 18,616 17,317 Capital lease assets 47,096 19,380 Total property and equipment $ 285,066 $ 278,286 Less accumulated depreciation and amortization (145,686 ) (128,363 ) Property and equipment, net $ 139,380 $ 149,923 Depreciation and amortization expense related to property, plant and equipment for the three and nine months ended June 28, 2019 was $7.3 million and $22.4 million , respectively. Depreciation and amortization expense related to property, plant and equipment for the three and nine months ended June 29, 2018 was $7.7 million and $23.0 million , respectively. Accumulated depreciation on capital lease assets as of June 28, 2019 and September 28, 2018 was $4.7 million and $3.2 million , respectively. During the three months ended June 28, 2019 , we entered into a plan to sell certain equipment with a net carrying value of $5.1 million . As of June 28, 2019 , the assets had not yet been sold and are recorded as assets held for sale. During July 2019, we completed the sale of these assets and did not incur a gain or loss on the sale.

Debt

Debt	9 Months Ended
	Jun. 28, 2019
Debt Disclosure [Abstract]
Debt	DEBT As of June 28, 2019 , we are party to a credit agreement dated as of May 8, 2014 with a syndicate of lenders and Goldman Sachs Bank USA ("Goldman Sachs"), as administrative agent (as amended on February 13, 2015, August 31, 2016, March 10, 2017, May 19, 2017, May 2, 2018 and May 9, 2018, the “Credit Agreement”). As of June 28, 2019 , the Credit Agreement consisted of term loans with an aggregate principal amount of $700.0 million (“Term Loans”) and a revolving credit facility with an aggregate borrowing capacity of $160.0 million (the "Revolving Facility"). The Revolving Facility will mature in November 2021 and the Term Loans will mature in May 2024 and bear interest at: (i) for LIBOR loans for any interest period, a rate per annum equal to the LIBOR rate as determined by the administrative agent, plus an applicable margin of 2.25% ; and (ii) for base rate loans, a rate per annum equal to the greater of (a) the prime rate quoted in the print edition of the Wall Street Journal, Money Rates Section, (b) the federal funds rate plus one-half of 1.00% and (c) the LIBOR rate applicable to a one-month interest period plus 1.00% (but, in each case, not less than 1.00% ), plus an applicable margin of 1.25% . All principal amounts outstanding and interest rate information as of June 28, 2019 , for the Credit Agreement were as follows (in thousands, except rate data): Principal Outstanding LIBOR Rate Margin Effective Interest Rate Term loans $674,693 2.44% 2.25% 4.69% As of June 28, 2019 , approximately $8.7 million of deferred financing costs remain unamortized, of which $8.0 million is related to the Term Loans and is recorded as a direct reduction of the recognized debt liabilities in our accompanying consolidated balance sheet, and $0.7 million is related to the Revolving Facility and is recorded in other long-term assets in our accompanying consolidated balance sheet. The Term Loans and Revolving Facility are secured by a first priority lien on substantially all of our assets and provide that we must comply with certain financial and non-financial covenants. The Term Loans are payable in quarterly principal installments of approximately $1.7 million on the last business day of each calendar quarter, with the remainder due on the maturity date. In the event that we divest a business, the net cash proceeds of the divestment are generally required, subject to certain exceptions, to be applied to repayment of outstanding Term Loans except to the extent we reinvest such proceeds in assets useful for our business within 18 months of receiving the proceeds. If we enter into a binding agreement to reinvest such proceeds within 18 months of receiving them, we have until the later of 18 months following our receipt of the proceeds and 6 months following the date of such agreement to complete the reinvestment. As of June 28, 2019 , we had $160.0 million of borrowing capacity under our Revolving Facility. As of June 28, 2019 , the following remained outstanding on the Term Loans (in thousands): Principal balance $ 674,693 Unamortized discount (3,717 ) Unamortized deferred financing costs (8,045 ) Total term loans $ 662,931 Current portion 6,885 Long-term, less current portion $ 656,046 As of June 28, 2019 , the minimum principal payments under the Term Loans in future fiscal years were as follows (in thousands): 2019 (remainder of fiscal year) $ 1,722 2020 6,885 2021 6,885 2022 6,885 2023 6,885 Thereafter 645,431 Total $ 674,693 The fair value of the Term Loans was estimated to be approximately $602.2 million as of June 28, 2019 , and was determined using Level 2 inputs, including a quoted rate from a bank.

Capital Lease and Financing Obl

Capital Lease and Financing Obligations Capital Lease and Financing Obligations	9 Months Ended
	Jun. 28, 2019
Leases [Abstract]
Capital Lease Obligations	. CAPITAL LEASE AND FINANCING OBLIGATIONS Corporate Facility Financing Obligation On December 28, 2016, we entered into three lease agreements including: (1) a 20 year leaseback of a facility located at 100 Chelmsford Street, (2) a 20 year build-to-suit lease arrangement for the construction and subsequent lease back of a new facility located at 144 Chelmsford Street, and (3) a 14 year building lease renewal of an adjacent facility at 121 Hale Street (collectively, the “Lowell Leases”). We account for the Lowell Leases as a single unit of accounting under the financing method. As of October 1, 2018, the construction of the facility at 144 Chelmsford Street was completed, the building was placed in service and the associated lease term commenced. We calculated a lease obligation based on the future minimum lease payments discounted at 7.2% as of October 1, 2018. The discount rate represents the estimated incremental borrowing rate over the lease term of 20 years. The minimum lease payments are recorded as interest expense and in part as a payment of principal reducing the lease obligation. The real property assets in the transaction remain on the consolidated balance sheets and continue to be depreciated over the remaining useful lives. As of June 28, 2019 and September 28, 2018 , the outstanding lease obligations associated with the Lowell Leases included in leases payable in the consolidated balance sheets, were $28.3 million and $28.3 million , respectively. Additionally, we have certain capital equipment lease obligations, of which $1.9 million and $1.2 million was outstanding as of June 28, 2019 and September 28, 2018 , respectively. As of June 28, 2019 , future minimum payments under capital lease obligations were as follows (in thousands): Fiscal year ending: Amount 2019 (remainder of fiscal year) $ 847 2020 3,384 2021 3,304 2022 2,661 2023 2,563 Thereafter 42,247 Total minimum capital lease payments 55,006 Less amount representing interest (26,433 ) Present value of net minimum capital lease payments $ 28,573

Intangible Assets

Intangible Assets	9 Months Ended
	Jun. 28, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	INTANGIBLE ASSETS Amortization expense related to intangible assets is as follows (in thousands): Three Months Ended Nine Months Ended June 28, June 29, June 28, June 29, Cost of revenue $ 8,139 $ 8,594 $ 24,074 $ 24,913 Selling, general and administrative 13,723 13,081 38,115 35,827 Total $ 21,862 $ 21,675 $ 62,189 $ 60,740 Intangible assets consist of the following (in thousands): June 28, September 28, Acquired technology $ 179,682 $ 251,673 Customer relationships 245,870 518,234 Trade name 3,400 3,400 Total $ 428,952 $ 773,307 Less accumulated amortization (235,194 ) (260,522 ) Intangible assets — net $ 193,758 $ 512,785 Our trade name is an indefinite-lived intangible asset. A summary of the activity in intangible assets and goodwill, which includes the impairment of $344.6 million of gross intangible assets, is as follows (in thousands): Intangible Assets Total Intangible Assets Acquired Technology Customer Trade Name Goodwill Balance at September 28, 2018 $ 773,307 $ 251,673 $ 518,234 $ 3,400 $ 314,076 Currency translation adjustment 270 270 — — 611 Impairments of intangible assets (344,625 ) (72,261 ) (272,364 ) — — Balance at June 28, 2019 $ 428,952 $ 179,682 $ 245,870 $ 3,400 $ 314,687 In connection with the impairment of certain customer relationships and acquired technology intangible assets, we revised the useful lives of these intangible assets to reflect the estimated period over which these assets are expected to contribute to future cash flows. As of June 28, 2019, the weighted-average amortization periods for our customer relationships and acquired technology are 9 years and 7 years , respectively. See Note 10 - Impairments , for additional information related to the impairment of our intangible assets. As of June 28, 2019 , our estimated amortization of our intangible assets in future fiscal years was as follows (in thousands): 2019 Remaining 2020 2021 2022 2023 Thereafter Total Amortization expense $ 12,530 50,330 46,213 33,433 26,048 21,804 $ 190,358 Accumulated amortization for acquired technology and customer relationships were $129.1 million and $106.1 million , respectively, as of June 28, 2019 , and $140.0 million and $120.5 million , respectively, as of September 28, 2018 .

Impairments

Impairments	9 Months Ended
	Jun. 28, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Impairments	IMPAIRMENTS During the fiscal quarter ended June 28, 2019 , we initiated a plan to strategically realign, streamline and improve our operations, including reducing our workforce and exiting certain product offerings and research and development facilities. See Note 15 - Restructurings , for additional information about the June 2019 restructuring plan. These activities led us to reassess our previous estimates for expected future revenue growth. We performed impairment analyses to determine whether our goodwill and long-lived assets, comprised of definite-lived intangible assets and property, plant and equipment, were recoverable. Based on the estimated undiscounted cash flow assessment for long-lived assets, we determined that for an asset group, the cash flows were not sufficient to recover the carrying value of the long-lived assets over their remaining useful lives. Accordingly, we recorded impairment charges of $217.5 million and $33.2 million to our customer relationship intangible assets and technology intangible assets, respectively, in the fiscal quarter ended June 28, 2019, based on the difference between the fair value and the carrying value of the long-lived assets. We will continue to monitor for events or changes in business circumstances that may indicate that the remaining carrying value of the asset group may not be recoverable. We used the income approach to determine the fair value of the definite-lived intangible assets and the cost approach to determine the fair value of its property, plant and equipment. Additionally, in connection with the June 2019 restructuring plan, we determined that certain intangible assets would be abandoned and would not have a future benefit. Accordingly, we recorded impairment charges of $2.4 million and $3.9 million to our customer relationship intangible assets and technology intangible assets, respectively, during the quarter ended June 28, 2019. During the three months ended June 28, 2019 , we determined that an asset recorded as construction in process would not be able to be placed in service as a productive asset, and therefore had no fair value. Accordingly, we recorded an impairment charge of $7.1 million for this asset during the three months ended June 28, 2019. During the nine months ended June 29, 2018, we recorded impairment charges of $6.6 million related to property and equipment and other assets designated for future use with one of our customers, Zhongxing Telecommunications Equipment Corporation ("ZTE"). See Note 15 - Restructurings for information related to property and equipment impaired as part of our restructuring actions.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Jun. 28, 2019
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS' EQUITY We have authorized 10 million shares of $0.001 par value preferred stock and 300 million shares of $0.001 par value common stock as of June 28, 2019 and September 28, 2018 , respectively. Common Stock Warrants —In March 2012, we issued warrants to purchase 1,281,358 shares of common stock for $14.05 per share. The warrants expire on December 21, 2020 , or earlier as per the terms of the agreement, including immediately following consummation of a sale of all or substantially all assets or capital stock or other equity securities, including by merger, consolidation, recapitalization or similar transactions. We do not currently have sufficient registered and available shares to immediately satisfy a request for registration, if such a request were made. As of June 28, 2019 , no exercise of the warrants had occurred, and no request had been made to register the warrants or any underlying securities for resale by the holders. We are recording the estimated fair values of the warrants as a long-term liability in the accompanying consolidated financial statements with changes in the estimated fair value being recorded in the accompanying statements of operations. See Note 5 - Fair Value for additional information related to the fair value of our warrant liability.

Earnings (Loss) Per Share

Earnings (Loss) Per Share	9 Months Ended
	Jun. 28, 2019
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	EARNINGS (LOSS) PER SHARE The following table sets forth the computation for basic and diluted net loss per share of common stock (in thousands, except per share data): Three Months Ended Nine Months Ended June 28, 2019 June 29, 2018 June 28, 2019 June 29, 2018 Numerator: Loss from continuing operations $ (324,714 ) $ (85,210 ) $ (394,314 ) $ (117,647 ) Loss from discontinued operations — (220 ) — (5,837 ) Net loss $ (324,714 ) $ (85,430 ) $ (394,314 ) $ (123,484 ) Warrant liability gain (1,927 ) — (5,788 ) (24,895 ) Net loss attributable to common stockholders $ (326,641 ) $ (85,430 ) $ (400,102 ) $ (148,379 ) Denominator: Weighted average common shares outstanding-basic 65,858 64,920 65,555 64,598 Dilutive effect of warrants 87 — 166 600 Weighted average common shares outstanding-diluted 65,945 $ 64,920 $ 65,722 $ 65,198 Loss per share-basic: Continuing operations $ (4.93 ) $ (1.31 ) $ (6.01 ) $ (1.82 ) Discontinued operations 0.00 0.00 0.00 (0.09 ) Net loss to common stock holders per share-basic $ (4.93 ) $ (1.32 ) $ (6.01 ) $ (1.91 ) Loss per share-diluted: Continuing operations $ (4.95 ) $ (1.31 ) $ (6.09 ) $ (2.19 ) Discontinued operations 0.00 0.00 0.00 (0.09 ) Net loss to common stock holders per share-diluted $ (4.95 ) $ (1.32 ) $ (6.09 ) $ (2.28 ) As of June 28, 2019 , we had warrants outstanding which were reported as a liability on the consolidated balance sheet. During the three and nine months ended June 28, 2019 and the nine months ended June 29, 2018 , we recorded $1.9 million , $5.8 million and $24.9 million of warrant gains, respectively, associated with adjusting the fair value of the warrants in the consolidated statements of operations primarily as a result of changes in our stock price. When calculating earnings per share, we are required to adjust for the dilutive effect of outstanding common stock equivalents, including adjustment to the numerator for the dilutive effect of contracts that must be settled in stock. During the three and nine months ended June 28, 2019 and the nine months ended June 29, 2018 , we adjusted the numerator by the warrant gains of $1.9 million , $5.8 million and $24.9 million , respectively, and the denominator by the incremental shares of 86,746 , 166,318 and 600,192 , respectively, under the treasury stock method. The table above excludes the effects of 80,046 and 129,599 shares for the three and nine months ended June 28, 2019 , respectively, and 724,886 and 422,584 shares for the three and nine months ended June 29, 2018 , respectively, of potential shares of common stock issuable upon exercise of stock options, warrants, restricted stock and restricted stock units, as applicable, as the inclusion would be antidilutive.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Jun. 28, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES From time to time, we may be subject to commercial disputes, employment issues, claims by other companies in the industry that we have infringed their intellectual property rights and other similar claims and litigations. Any such claims may lead to future litigation and material damages and defense costs. We were not involved in any material pending legal proceedings during the fiscal quarter ended June 28, 2019 .

Restructurings

Restructurings	9 Months Ended
	Jun. 28, 2019
Restructuring and Related Activities [Abstract]
Restructurings	RESTRUCTURINGS We have periodically implemented restructuring actions in connection with broader plans to reduce staffing, reduce our internal manufacturing footprint and generally reduce operating costs. The restructuring expenses are primarily comprised of direct and incremental costs related to headcount reductions including severance and outplacement fees for the terminated employees, as well as facility closure costs. The following is a summary of the restructuring charges incurred for the three and nine months ended June 28, 2019 and June 29, 2018 under these restructuring plans (in thousands): Three Months Ended Nine Months Ended June 28, June 29, June 28, June 29, Employee related expenses $ 5,135 $ 4 $ 6,742 $ 2,796 Facility related expenses 3,752 98 10,305 3,506 Total restructuring charges $ 8,887 $ 102 $ 17,047 $ 6,302 The following is a summary of the costs incurred for the nine months ended June 28, 2019 (in thousands): Balance as of September 28, 2018 $ 89 Current period expense 17,047 Charges paid/settled (11,956 ) Balance as of June 28, 2019 $ 5,180 Long Beach, Belfast and Sydney Plan During the fiscal quarter ended December 29, 2017, we initiated plans to restructure and close our facility in Long Beach, California and to close our facilities in Belfast, United Kingdom and Sydney, Australia. The operations from the Long Beach facility were consolidated into our other California locations in order to achieve operational synergies. The Belfast and Sydney facilities were closed as we discontinued certain product development activities that were performed in those locations. This action is complete, and no further costs will be incurred. Ithaca Plan During the fiscal quarter ended September 28, 2018, we initiated a plan to exit certain production and product lines, primarily related to certain production facilities located in Ithaca, New York. For these facilities, we incurred restructuring charges of $0.2 million in the three months ended June 28, 2019 , including $0.1 million of employee-related costs. We incurred $5.5 million in the nine months ended June 28, 2019 , including $1.5 million of employee-related costs and $4.0 million of facility-related costs. We do not expect to incur material restructuring costs during the remainder of fiscal year 2019 as we complete this restructuring action. Design Facilities Plan During the fiscal quarter ended March 29, 2019, we committed to a plan to exit certain design facilities and activities. We incurred restructuring reimbursements and charges of $(0.3) million and $2.5 million in the three and nine months ended June 28, 2019 , respectively, under this plan. We do not expect to incur material restructuring costs during the remainder of fiscal year 2019 as we complete this restructuring action. 2019 Plan During the fiscal quarter ended June 28, 2019, we committed to a plan to strategically realign, streamline and improve certain of our business and operations, including reducing our workforce by approximately 250 employees and exiting seven development facilities in France, Japan, the Netherlands, Florida, Massachusetts, New Jersey and Rhode Island. Additionally, we will no longer invest in the design and development of optical modules and subsystems for Data Center applications. We incurred restructuring charges of $9.0 million in the three months ended June 28, 2019 under this plan, including $4.9 million of employee-related costs, $4.0 million of impairment expense for fixed assets that will be disposed of and $0.1 million of other costs. We expect to incur restructuring costs of approximately $2.9 million to $3.9 million through fiscal year 2020 as we complete this restructuring action, including approximately $2.2 million of employee-related costs and $1.7 million of facility-related costs.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Jun. 28, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION Stock Plans As of June 28, 2019 , we had 14.7 million shares available for issuance under our 2012 Omnibus Incentive Plan (as Amended and Restated) (the “2012 Plan”) and 3.4 million shares available for issuance under our Employee Stock Purchase Plan. Under the 2012 Plan, we have the ability to issue incentive stock options (“ISOs”), non-statutory stock options (“NSOs”), performance based non-statutory stock options, stock appreciation rights, restricted stock awards (“RSAs”), restricted stock units (“RSUs”), performance-based restricted stock units (“PRSUs”), performance shares and other equity-based awards to employees, directors and outside consultants. The ISOs and NSOs must be granted at a price per share not less than the fair value of our common stock on the date of grant. Options granted to date primarily vest based on certain market-based and performance-based criteria. Options granted generally have a term of four years to seven years . Certain of the share-based awards granted and outstanding as of June 28, 2019 are subject to accelerated vesting upon a change in control of the Company. Share-Based Compensation The following table shows a summary of share-based compensation expense included in the Condensed Consolidated Statements of Operations for the three and nine months ended June 28, 2019 and June 29, 2018 (in thousands): Three Months Ended Nine Months Ended June 28, June 29, June 28, June 29, Cost of revenue $ 651 $ 1,019 $ 2,165 $ 2,881 Research and development 2,517 3,785 6,540 10,422 Selling, general and administrative (353 ) 3,950 11,458 10,792 Total share-based compensation expense $ 2,815 $ 8,754 $ 20,163 $ 24,095 During the three months ended June 28, 2019 , we assessed the potential vesting of the outstanding PRSU awards against the performance conditions. Based on this analysis, we determined that the probability of achieving certain performance conditions was lower than previously expected. As such, we reduced the estimated share-based compensation associated with these awards, which resulted in a cumulative adjustment of $4.7 million for these awards. As of June 28, 2019 , the total unrecognized compensation costs related to ISOs, RSAs and RSUs, including awards with time-based and performance-based vesting was $62.7 million , which we expect to recognize over a weighted-average period of 3.0 years. As of June 28, 2019 , total unrecognized compensation cost related to our Employee Stock Purchase Plan was $1.1 million . Stock Options A summary of stock option activity for the nine months ended June 28, 2019 is as follows (in thousands, except per share amounts and contractual term): Number of Shares Weighted-Average Exercise Price per Share Weighted-Average Remaining Contractual Term (in Years) Aggregate Intrinsic Value Options outstanding - September 28, 2018 1,408 $ 32.05 Granted 585 15.44 Exercised (23 ) 2.00 Forfeited, canceled or expired (1,207 ) 35.43 Options outstanding - June 28, 2019 763 $ 14.86 4.30 $ 892 Options vested and expected to vest - June 28, 2019 763 14.86 4.30 892 Options exercisable - June 28, 2019 188 $ 13.11 1.50 $ 706 Aggregate intrinsic value represents the difference between our closing stock price on June 28, 2019 and the exercise price of outstanding, in-the-money options. During the nine months ended June 28, 2019 , there were 22,795 options exercised. The total intrinsic value of options exercised was $0.1 million and $0.3 million for the three and nine months ended June 28, 2019 , respectively, and $0.7 million for the nine months ended June 29, 2018 . There were no stock options exercised in the three months ended June 29, 2018 . Stock Options with Market-based Vesting Criteria We grant non-qualified stock options that are subject to vesting only upon the market price of our underlying public stock closing above a certain price target within seven years of the date of grant. Share-based compensation expense is recognized regardless of the number of awards that are earned based on the market condition and is recognized on a straight-line basis over the estimated service period. If the required service period is not met for these options, then the share-based compensation expense would be reversed. In the event that our common stock achieves the target price per share based on a 30 -day trailing average prior to the end of the estimated service period, any remaining unamortized compensation cost will be recognized. We granted 585,000 market-based stock options during the nine months ended June 28, 2019 , at a weighted average grant date fair value of $7.47 per share, or $4.4 million . These options have a weighted average exercise price of $15.44 . These non-qualified stock options with market based vesting conditions were valued using a Monte Carlo simulation model. The weighted average Monte Carlo input assumptions used for calculating the fair value of these market-based stock options are as follows: Nine Months Ended June 28, 2019 Risk-free interest rate 2.8 % Expected term (years) 3.91 Expected volatility rate 51.9 % Target price $53.87 During the nine months ended June 28, 2019 , we canceled 1,122,500 performance-based stock options with a concurrent grant of 748,328 PRSUs for 13 employees, which was accounted for as a modification. The incremental compensation cost resulting from the modification was $8.2 million , and will be recognized as share-based compensation expense over the requisite service period of three years for the new PRSU awards. Restricted Stock, Restricted Stock Units and Performance-Based Restricted Stock Units A summary of RSAs, RSUs and PRSUs activity for the nine months ended June 28, 2019 is as follows: Number of RSAs, RSUs and PRSUs (in thousands) Weighted- Average Grate Date Fair Value Aggregate Intrinsic Value (in thousands) Balance at September 28, 2018 1,872 $ 34.15 $ 38,452 Granted 2,916 18.18 Vested and released (632 ) 35.43 Forfeited, canceled or expired (743 ) 27.37 Balance at June 28, 2019 3,413 $ 21.74 $ 51,646 RSAs, RSUs and PRSUs that vested during the nine months ended June 28, 2019 and June 29, 2018 had fair value of $10.9 million and $19.2 million , respectively, as of the vesting date. We granted 200,000 market-based PRSUs during the three months ended June 28, 2019 , at a weighted average grant date fair value of $17.65 per share, or $3.5 million . These awards were valued using a Monte Carlo simulation model subject to vesting based on the total shareholder return of our underlying public stock in comparison to a peer group of companies in the Nasdaq Composite Index. Share-based compensation expense is recognized based on the grant date fair value of the awards of $3.5 million subject to the market condition. If the required service period is not met for these awards, then the share-based compensation expense would be reversed. The Monte Carlo input assumptions used for calculating the fair value of these market-based performance RSUs are as follows: Nine Months Ended June 28, 2019 Risk free interest rate 1.9 % Years to maturity 3.33 Expected volatility rate 61.5 %

Income Taxes

Income Taxes	9 Months Ended
	Jun. 28, 2019
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES We are subject to income tax in the U.S. as well as other tax jurisdictions in which we conduct business. Earnings from non-U.S. activities are subject to local country income tax and may also be subject to current U.S. income tax. For interim periods, we record a tax provision or benefit based upon the estimated effective tax rate expected for the full fiscal year, adjusted for material discrete taxation matters arising during the interim periods. Income tax expense was $0.3 million for the nine months ended June 28, 2019 , compared to a benefit of $11.2 million for the nine months ended June 29, 2018 . The difference between the U.S. federal statutory income tax rate of 21% for the three and nine months ended June 28, 2019 was primarily driven by the continuation of a full valuation allowance against any benefit associated with U.S. losses and income taxed in foreign jurisdictions at generally lower tax rates. The difference between the blended U.S. federal statutory income tax rate of 24.5% for the three and nine months ended months ended June 29, 2018 and our effective income tax rate was primarily driven by the continuation of a full valuation allowance against any benefit associated with U.S. losses and income taxed in foreign jurisdictions at generally lower tax rates. We recognize deferred tax assets to the extent that we believe that these assets are more likely than not to be realized. In making this determination, we consider available positive and negative evidence and factors that may impact the valuation of our deferred tax asset including results of recent operations, future reversals of existing taxable temporary differences, projected future taxable income, and tax-planning strategies. A significant piece of objective negative evidence evaluated was the cumulative U.S. loss initially incurred over the three-year period ended March 31, 2017, which we believe limited our ability to consider other subjective evidence, such as our projections for future growth. Significant negative objective evidence in the form of adjusted cumulative losses in the U.S. over the three-year period ended June 28, 2019 resulted in our continued determination that there was not sufficient objectively verifiable positive evidence to offset this negative objective evidence and we concluded that a full valuation allowance was still appropriate for our U.S. deferred tax assets. All earnings of foreign subsidiaries, other than our M/A-COM Technology Solutions International Limited Cayman Islands subsidiary (“Cayman Islands subsidiary”), are considered indefinitely reinvested for the periods presented. During the three months ended March 29, 2019, we changed our position for our Cayman Islands subsidiary to no longer have its earnings permanently reinvested. During the fiscal quarter ended June 28, 2019, we finalized our fiscal 2018 tax return, including the calculation of the one-time deemed repatriation of gross foreign earnings and profits, totaling $156.8 million , which resulted in approximately $86.7 million in U.S. taxable income for the year ended September 28, 2018. As we have recorded a full valuation allowance for this period, the adjusted one-time deemed repatriation will continue to have no impact on our tax expense. The actual tax loss for the year ended September 28, 2018 has fully offset this one-time deemed repatriation of taxable income resulting in no additional cash tax payments. The balance of the unrecognized tax benefits as of June 28, 2019 and September 28, 2018 was $1.0 million and $0.3 million , respectively. The increase of $0.7 million in unrecognized tax benefits during the nine months ended June 28, 2019 was all recognized during the fiscal quarter ended December 28, 2018 and resulted from finalizing the transition tax impact relating to the one-time deemed repatriation of gross foreign earnings and profits for the year ended September 28, 2018 . In finalizing the transition tax, we identified certain tax accounting method changes that were required to compute the correct transition tax, yet the tax law prohibited adopting these methods without filing for and receiving Internal Revenue Service ("IRS") permission to change our method. The increase in transition tax related to these non-automatic method changes requiring IRS approval was $0.7 million and represents the increase in our FIN 48 reserve balance to $1.0 million as of December 28, 2018 and June 28, 2019 . Out of the total reserve balance of $1.0 million , $0.3 million , if recognized, will reduce income tax expense. It is also our policy to recognize any interest and penalties accrued related to unrecognized tax benefits in income tax expense. During the fiscal quarters ended June 28, 2019 and September 28, 2018 , we did not make any accrual or payment of interest and penalties due to our net operating loss carryforward position within the U.S. On December 22, 2017, the U.S. Congress enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act enacted a wide range of changes to the U.S. corporate income tax system, many of which differ significantly from the provisions of the previous U.S. tax law. The Tax Act also transitions international taxation from a worldwide system with deferral to a modified territorial system and includes base erosion prevention measures on non-U.S. earnings, which has the effect of subjecting certain earnings of our foreign subsidiaries to U.S. taxation as global intangible low-taxed income. These changes became effective in our fiscal year beginning September 29, 2018.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Jun. 28, 2019
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS Cadence Design Systems, Inc. ("Cadence") provides us with certain engineering licenses on an ongoing basis. Geoffrey Ribar, who joined our board of directors on March 22, 2017, served as an officer of Cadence through September 30, 2017 and served as a Senior Advisor to Cadence until March 31, 2018. During the nine months ended June 29, 2018 we made payments to Cadence of $4.1 million subsequent to Mr. Ribar joining our board of directors and prior to March 31, 2018.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	9 Months Ended
	Jun. 28, 2019
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	SUPPLEMENTAL CASH FLOW INFORMATION As of June 28, 2019 and June 29, 2018 , we had $6.2 million and $2.8 million , respectively, in unpaid amounts related to purchases of property and equipment included in accounts payable and accrued liabilities during each period. These amounts have been excluded from the payments for purchases of property and equipment in the accompanying condensed consolidated statements of cash flows until paid. During the nine months ended June 28, 2019 and June 29, 2018 , we capitalized $1.5 million and $16.5 million , respectively, of net construction costs relating to the 144 Chelmsford Street facility, of which $0.3 million and $10.8 million , respectively, were accounted for as a non-cash transaction as the costs were paid by the developer. During the nine months ended June 28, 2019 , we capitalized an additional $1.5 million of equipment under capital leases, which were accounted for as non-cash transactions. During the nine months ended June 29, 2018 , no additional capital leases were recorded. The following is supplemental cash flow information regarding non-cash investing and financing activities (in thousands): Nine Months Ended June 28, June 29, Cash paid for interest $ 25,675 $ 21,804 Cash (refunded) paid for income taxes $ (1,713 ) $ 3,435

Geographic and Significant Cust

Geographic and Significant Customer Information	9 Months Ended
	Jun. 28, 2019
Segment Reporting [Abstract]
Geographic and Significant Customer Information	GEOGRAPHIC AND SIGNIFICANT CUSTOMER INFORMATION We have one reportable operating segment that designs, develops, manufactures and markets semiconductors and modules. The determination of the number of reportable operating segments is based on the chief operating decision maker’s use of financial information for the purposes of assessing performance and making operating decisions. In evaluating financial performance and making operating decisions, the chief operating decision maker primarily uses consolidated revenue, gross profit and operating loss. We are currently evaluating our internal reporting structure and the potential impact of any changes on our segment reporting. For information about our revenue in different geographic regions, based upon customer locations, see Note 2 - Revenue . Information about our long-lived assets in different geographic regions is presented below (in thousands): As of Long-Lived Assets by Geographic Region June 28, September 28, United States $ 114,326 $ 122,888 Asia Pacific (1) 16,820 24,702 Other Countries (2) 8,234 2,333 Total $ 139,380 $ 149,923 (1) Asia Pacific represents Taiwan, India, Japan, Thailand, South Korea, Singapore, Malaysia, the Philippines, Vietnam and China. (2) No international country or region represented greater than 10% of the total net long-lived assets as of the dates presented, other than the Asia Pacific region as presented above. The following is a summary of customer concentrations as a percentage of revenue and accounts receivable as of and for the periods presented: Three Months Ended Nine Months Ended Revenue June 28, June 29, June 28, June 29, Customer A 17 % 14 % 15% 12% Accounts Receivable June 28, September 28, Customer A 23 % 19 % Customer B 13 % 26 % No other customer represented more than 10% of revenue or accounts receivable in the periods presented in the accompanying consolidated financial statements. For the three and nine months ended June 28, 2019 , our top ten customers represented 54% and 54% , respectively, of total revenue, and for the three and nine months ended June 29, 2018 , our top ten customers represented 59% and 55% of total revenue, respectively.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Jun. 28, 2019
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation— We have one reportable segment, semiconductors and modules. The accompanying consolidated financial statements include our accounts and the accounts of our majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Fiscal Period	We have a 52- or 53-week fiscal year ending on the Friday closest to the last day of September. The fiscal years 2019 and 2018 include 52 weeks. To offset the effect of holidays, for fiscal years in which there are 53 weeks, we include the extra week arising in such fiscal years in the first quarter.
Use of Estimates	Use of Estimates —The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities during the reporting periods, the reported amounts of revenue and expenses during the reporting periods, and the disclosure of contingent assets and liabilities at the date of the financial statements. On an ongoing basis, we base estimates and assumptions on historical experience, currently available information and various other factors that management believes to be reasonable under the circumstances. Actual results may differ materially from these estimates and assumptions.
Revenue from Contract with Customer [Policy Text Block]	Revenue Recognition— Substantially all of our revenue is derived from sales of high-performance radio frequency ("RF"), microwave, millimeterwave and lightwave semiconductor solutions into three primary markets: Telecom, Data Centers and Industrial and Defense ("I&D"). Revenue is recognized when a customer obtains control of products or services, in an amount that reflects the consideration which we expect to receive in exchange for those goods or services. To determine revenue recognition for arrangements within the scope of Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers , we perform the following five steps: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when (or as) we satisfy performance obligations. Sales, value add and other taxes collected on behalf of third parties are excluded from revenue. Our revenue arrangements do not contain significant financing components. Contracts with our customers principally contain only one distinct performance obligation, which is the sale of products. However, due to multiple products potentially being sold on a single order, we are required to allocate consideration based on the estimated relative standalone selling prices of the promised products. Periodically, we enter into non-product development and license contracts with certain customers. We generally recognize revenue from these contracts as services are provided based on the terms of the contract. Revenue is deferred for amounts billed or received prior to delivery of the services. Certain contracts may contain multiple performance obligations for which we allocate revenue to each performance obligation on a relative stand-alone selling price. Our product revenue is recognized when the customer obtains control of the product or services, which generally occurs at a point in time, and is based on the contractual shipping terms of a contract. Non-product revenue is generally recognized over time. For each contract, the promise to transfer the control of the products or services, each of which is individually distinct, is considered to be the identified performance obligation. We provide an assurance type warranty which is not sold separately and does not represent a separate performance obligation. Therefore, we account for such warranties under ASC 460, Guarantees , and the estimated costs of warranty claims are generally accrued as cost of revenue in the period the related revenue is recorded. We have agreements with certain customers which may include certain rights of return and pricing programs, including returns for aged inventory, stock rotation and price protection which affect the transaction price. Sales to these customers and programs offered are in accordance with terms set forth in written agreements, which require us to assess the potential revenue effects of this variable consideration utilizing the expected value method. Variable consideration is included in the transaction price if, in our judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. As such, revenue on sales to customers that include rights of return and pricing programs are recorded net of estimated variable consideration, utilizing the expected value method based on historical sales data. We believe that the judgments and estimates we utilize are reasonable based upon current facts and circumstances, however utilizing different judgments and estimates could result in different amounts. Practical Expedients and Elections — ASC 606 requires that we disclose the aggregate amount of transaction price that is allocated to performance obligations that have not yet been satisfied as of the reporting periods presented. The guidance provides certain practical expedients that limit this requirement and, therefore, we do not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which revenue is recognized at the amount to which we have the right to invoice for services performed. We have elected not to disclose the aggregate amount of transaction prices associated with unsatisfied or partially unsatisfied performance obligations for contracts where these criteria are met. Our policy is to capitalize any incremental costs incurred to obtain a customer contract, only to the extent that the benefit associated with the costs is expected to be longer than one year. Capitalizable contract costs were not significant both at the date of adoption and as of June 28, 2019 .
Recent Accounting Pronouncements	Recent Accounting Pronouncements —Our Recent Accounting Pronouncements are described in the notes to our September 28, 2018 consolidated financial statements, which were included in our Annual Report on Form 10-K for our fiscal year ended September 28, 2018 . Pronouncements Adopted in Fiscal Year 2019 We adopted Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers, on September 29, 2018. The FASB subsequently issued several amendments and updates to the new revenue standard. We refer to ASU 2014-09 and its related ASUs as "ASC 606". We applied ASC 606 using the modified retrospective method and elected to apply this initial application of the standard only to contracts that are not completed at the date of initial application. We have analyzed this effect and found the adoption of the new guidance did not have a material impact on our consolidated financial statements as of the adoption date. The reported results for our fiscal year 2019 reflect the application of ASC 606 guidance while the reported results for our fiscal year 2018 were prepared under the guidance of ASC 605, Revenue Recognition . We adopted ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, on September 29, 2018. In February 2018, the FASB issued further amendments to this guidance. This update made amendments to the guidance in GAAP on the classification and measurement of financial instruments. The new standard significantly revised an entity's accounting related to (1) the classification and measurement of investments in equity securities and (2) the presentation of certain fair value changes for financial liabilities measured at fair value. It also amended certain disclosure requirements associated with the fair value of financial instruments. The adoption of this update did not have a material impact on our consolidated financial statements and related disclosures. We adopted ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments, on September 29, 2018. This update addressed debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, distributions received from equity method investees, beneficial interests in securitization transactions and separately identifiable cash flows and application of the predominance principle. The adoption of this update did not have a material impact on our consolidated financial statements and related disclosures. We adopted ASU 2016-16, Intra-Entity Transfers of Assets Other Than Inventory, on September 29, 2018. This update amended the guidance on recognizing the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the amendment eliminated the exception for an intra entity transfer of an asset other than inventory. The adoption of this updated standard did not have a material impact on our consolidated financial statements and related disclosures. Pronouncements for Adoption in Subsequent Periods In February 2016, the FASB issued ASU 2016-02, Leases ("ASC 842"). The FASB subsequently issued several amendments and updates to the new leasing standard. The new standard increases transparency and comparability among organizations by recognizing right-of-use assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. Under ASC 842, leases are classified as either operating or finance, based on criteria similar to current lease accounting, but without explicit bright lines. ASC 842 is effective for us as of September 28, 2019, and we intend to apply ASC 842 using the cumulative-effect adjustment on this date, with comparative periods presented in accordance with the previous guidance in ASC 840, Leases

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Jun. 28, 2019
Revenue [Abstract]
Disaggregation of Revenue	The following tables present our revenue disaggregated by markets and geography (in thousands): Three Months Ended Nine Months Ended 6/28/2019 6/29/2018 6/28/2019 6/29/2018 Revenue by Market: Industrial & Defense $ 46,809 $ 48,399 $ 154,563 $ 132,994 Data Center 17,614 38,911 91,518 116,269 Telecom 43,883 50,562 141,379 169,947 Total $ 108,306 $ 137,872 $ 387,460 $ 419,210 Three Months Ended Nine Months Ended 6/28/2019 6/29/2018 6/28/2019 6/29/2018 Revenue by Geographic Region: United States $ 52,340 $ 67,861 $ 185,172 $ 197,540 China 27,451 39,016 104,491 115,068 Asia Pacific, excluding China (1) 16,371 17,795 60,384 64,028 Other Countries (2) 12,144 13,200 37,413 42,574 Total $ 108,306 $ 137,872 $ 387,460 $ 419,210 (1) Asia Pacific represents Taiwan, Japan, Singapore, India, Thailand, South Korea, Australia, Malaysia, New Zealand and the Philippines. (2) No international country or region represented greater than 10% of the total revenue as of the dates presented, other than China and the Asia Pacific region as presented above.
Contract with Customer, Asset and Liability	The following table presents the changes in contract liabilities during the nine months ended June 28, 2019 (in thousands): June 28, 2019 September 28, 2018 $ Change % Change Contract liabilities $ 10,685 $ 7,757 $ 2,928 38 % During the three and nine months ended June 28, 2019 , we recognized the following net sales as a result of changes in the contract liabilities balance (in thousands): Three Months Ended Nine Months Ended June 28, 2019 June 28, 2019 Net revenue recognized in the period from: Amounts included in contract liabilities at the beginning of the period $ 59 $ 7,640

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Jun. 28, 2019
Discontinued Operations and Disposal Groups [Abstract]
Summary of Operating Results through Dates of Divestiture Related to Divested Businesses	The accompanying consolidated statements of operations include the following operating results related to these discontinued operations (in thousands): Three Months Ended Nine Months Ended June 29, 2018 June 29, 2018 Revenue $ — $ — Cost of revenue — (596 ) Gross profit — 596 Operating expenses: Research and development 175 4,873 Selling, general and administrative 45 1,560 Total operating expenses 220 6,433 Loss from operations (220 ) (5,837 ) Loss before income taxes (220 ) (5,837 ) Income tax provision — — Loss from discontinued operations $ (220 ) $ (5,837 ) Cash flow from operating activities (29 ) (10,356 )

Short Term Investments (Tables)

Short Term Investments (Tables)	9 Months Ended
	Jun. 28, 2019
Investments, Debt and Equity Securities [Abstract]
Summary of Available for Sale Investments	The amortized cost, gross unrealized holding gains or losses, and fair value of our investments by major investment type as of June 28, 2019 and September 28, 2018 are summarized in the tables below (in thousands): June 28, 2019 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 29,235 $ 128 $ (120 ) $ 29,243 Commercial paper 71,306 4 (33 ) 71,277 Total short-term investments $ 100,541 $ 132 $ (153 ) $ 100,520 September 28, 2018 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 28,731 $ — $ (460 ) $ 28,271 Commercial paper 69,966 — (16 ) 69,950 Total short-term investments $ 98,697 $ — $ (476 ) $ 98,221
Summary of Contractual Maturities of Investments	The contractual maturities of available-for-sale investments were as follows (in thousands): June 28, 2019 September 28, 2018 Less than 1 year $ 73,078 $ 70,200 Over 1 year 27,442 28,021 Total short-term investments $ 100,520 $ 98,221

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Jun. 28, 2019
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis consist of the following (in thousands): June 28, 2019 Fair Value Active Markets for Identical Assets (Level 1) Observable Inputs (Level 2) Unobservable Inputs (Level 3) Assets Money market funds $ 241 $ 241 $ — $ — Commercial paper 71,277 — 71,277 — Corporate bonds 29,243 — 29,243 — Total assets measured at fair value $ 100,761 $ 241 $ 100,520 $ — Liabilities Common stock warrant liability 7,341 — — 7,341 Total liabilities measured at fair value $ 7,341 $ — $ — $ 7,341 September 28, 2018 Fair Value Active Markets for Identical Assets (Level 1) Observable Inputs (Level 2) Unobservable Inputs (Level 3) Assets Money market funds $ 253 $ 253 $ — $ — Commercial paper 69,950 — 69,950 — Corporate bonds 28,271 — 28,271 — Total assets measured at fair value $ 98,474 $ 253 $ 98,221 $ — Liabilities Contingent consideration $ 585 $ — $ — $ 585 Common stock warrant liability 13,129 — — 13,129 Total liabilities measured at fair value $ 13,714 $ — $ — $ 13,714
Quantitative information Used in Fair Value Calculation of Level 3 Liabilities	The quantitative information utilized in the fair value calculation of our Level 3 liabilities is as follows: Inputs Liabilities Valuation Technique Unobservable Input June 28, 2019 September 28, 2018 Contingent consideration Discounted cash flow Discount rate N/A 9.2% Probability of achievement N/A 90% Timing of cash flows N/A 1 month Warrant liability Black-Scholes model Volatility 73.4% 60.7% Discount rate 1.84% 2.81% Expected life 1.5 years 2.2 years Exercise price $14.05 $14.05 Stock price $15.13 $20.60 Dividend rate —% —%
Changes in Liabilities with Inputs Classified within Level 3 of Fair Value	The changes in liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands): September 28, Net Realized/Unrealized Losses (Gains) Included in Earnings Purchases and Issuances Sales and Settlements June 28, Contingent consideration $ 585 $ 65 $ — $ (650 ) $ — Common stock warrant liability $ 13,129 $ (5,788 ) $ — $ — $ 7,341 September 29, Net Realized/Unrealized Gains Included in Earnings Purchases and Issuances Sales and Settlements June 29, Contingent consideration $ 1,679 $ (469 ) $ — $ (700 ) $ 510 Common stock warrant liability $ 40,775 $ (24,895 ) $ — $ — $ 15,880
Changes in Assets with Inputs Classified within Level 3 of Fair Value	The changes in liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands): September 28, Net Realized/Unrealized Losses (Gains) Included in Earnings Purchases and Issuances Sales and Settlements June 28, Contingent consideration $ 585 $ 65 $ — $ (650 ) $ — Common stock warrant liability $ 13,129 $ (5,788 ) $ — $ — $ 7,341 September 29, Net Realized/Unrealized Gains Included in Earnings Purchases and Issuances Sales and Settlements June 29, Contingent consideration $ 1,679 $ (469 ) $ — $ (700 ) $ 510 Common stock warrant liability $ 40,775 $ (24,895 ) $ — $ — $ 15,880

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Jun. 28, 2019
Inventory Disclosure [Abstract]
Components of Inventories	Inventories, consist of the following (in thousands): June 28, September 28, Raw materials $ 60,958 $ 71,408 Work-in-process 13,949 13,466 Finished goods 35,639 37,963 Total inventory, net $ 110,546 $ 122,837

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	9 Months Ended
	Jun. 28, 2019
Property, Plant and Equipment [Abstract]
Components of Property, Plant and Equipment	Property, plant and equipment consists of the following (in thousands): June 28, September 28, Construction in process $ 29,288 $ 49,661 Machinery and equipment 172,934 174,638 Leasehold improvements 13,449 14,984 Furniture and fixtures 3,683 2,306 Computer equipment and software 18,616 17,317 Capital lease assets 47,096 19,380 Total property and equipment $ 285,066 $ 278,286 Less accumulated depreciation and amortization (145,686 ) (128,363 ) Property and equipment, net $ 139,380 $ 149,923

Debt (Tables)

Debt (Tables)	9 Months Ended
	Jun. 28, 2019
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	All principal amounts outstanding and interest rate information as of June 28, 2019 , for the Credit Agreement were as follows (in thousands, except rate data): Principal Outstanding LIBOR Rate Margin Effective Interest Rate Term loans $674,693 2.44% 2.25% 4.69%
Schedule of Remained Outstanding on Term Loans	As of June 28, 2019 , the following remained outstanding on the Term Loans (in thousands): Principal balance $ 674,693 Unamortized discount (3,717 ) Unamortized deferred financing costs (8,045 ) Total term loans $ 662,931 Current portion 6,885 Long-term, less current portion $ 656,046
Schedule of Minimum Principal Payments under Term Loans	As of June 28, 2019 , the minimum principal payments under the Term Loans in future fiscal years were as follows (in thousands): 2019 (remainder of fiscal year) $ 1,722 2020 6,885 2021 6,885 2022 6,885 2023 6,885 Thereafter 645,431 Total $ 674,693

Capital Lease and Financing O_2

Capital Lease and Financing Obligations (Tables)	9 Months Ended
	Jun. 28, 2019
Leases [Abstract]
Schedule of Future Minimum Lease Payments for Capital Leases	As of June 28, 2019 , future minimum payments under capital lease obligations were as follows (in thousands): Fiscal year ending: Amount 2019 (remainder of fiscal year) $ 847 2020 3,384 2021 3,304 2022 2,661 2023 2,563 Thereafter 42,247 Total minimum capital lease payments 55,006 Less amount representing interest (26,433 ) Present value of net minimum capital lease payments $ 28,573

Intangible Assets (Tables)

Intangible Assets (Tables)	9 Months Ended
	Jun. 28, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Amortization Expense of Intangible Assets	Amortization expense related to intangible assets is as follows (in thousands): Three Months Ended Nine Months Ended June 28, June 29, June 28, June 29, Cost of revenue $ 8,139 $ 8,594 $ 24,074 $ 24,913 Selling, general and administrative 13,723 13,081 38,115 35,827 Total $ 21,862 $ 21,675 $ 62,189 $ 60,740
Summary of Intangible Assets	Intangible assets consist of the following (in thousands): June 28, September 28, Acquired technology $ 179,682 $ 251,673 Customer relationships 245,870 518,234 Trade name 3,400 3,400 Total $ 428,952 $ 773,307 Less accumulated amortization (235,194 ) (260,522 ) Intangible assets — net $ 193,758 $ 512,785
Summary of Activity in Intangible Assets and Goodwill	A summary of the activity in intangible assets and goodwill, which includes the impairment of $344.6 million of gross intangible assets, is as follows (in thousands): Intangible Assets Total Intangible Assets Acquired Technology Customer Trade Name Goodwill Balance at September 28, 2018 $ 773,307 $ 251,673 $ 518,234 $ 3,400 $ 314,076 Currency translation adjustment 270 270 — — 611 Impairments of intangible assets (344,625 ) (72,261 ) (272,364 ) — — Balance at June 28, 2019 $ 428,952 $ 179,682 $ 245,870 $ 3,400 $ 314,687
Summary of Estimated Amortization of Intangible Assets in Future Fiscal Years	As of June 28, 2019 , our estimated amortization of our intangible assets in future fiscal years was as follows (in thousands): 2019 Remaining 2020 2021 2022 2023 Thereafter Total Amortization expense $ 12,530 50,330 46,213 33,433 26,048 21,804 $ 190,358

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	9 Months Ended
	Jun. 28, 2019
Earnings Per Share [Abstract]
Computation for Basic and Diluted Net Loss Per Share of Common Stock	The following table sets forth the computation for basic and diluted net loss per share of common stock (in thousands, except per share data): Three Months Ended Nine Months Ended June 28, 2019 June 29, 2018 June 28, 2019 June 29, 2018 Numerator: Loss from continuing operations $ (324,714 ) $ (85,210 ) $ (394,314 ) $ (117,647 ) Loss from discontinued operations — (220 ) — (5,837 ) Net loss $ (324,714 ) $ (85,430 ) $ (394,314 ) $ (123,484 ) Warrant liability gain (1,927 ) — (5,788 ) (24,895 ) Net loss attributable to common stockholders $ (326,641 ) $ (85,430 ) $ (400,102 ) $ (148,379 ) Denominator: Weighted average common shares outstanding-basic 65,858 64,920 65,555 64,598 Dilutive effect of warrants 87 — 166 600 Weighted average common shares outstanding-diluted 65,945 $ 64,920 $ 65,722 $ 65,198 Loss per share-basic: Continuing operations $ (4.93 ) $ (1.31 ) $ (6.01 ) $ (1.82 ) Discontinued operations 0.00 0.00 0.00 (0.09 ) Net loss to common stock holders per share-basic $ (4.93 ) $ (1.32 ) $ (6.01 ) $ (1.91 ) Loss per share-diluted: Continuing operations $ (4.95 ) $ (1.31 ) $ (6.09 ) $ (2.19 ) Discontinued operations 0.00 0.00 0.00 (0.09 ) Net loss to common stock holders per share-diluted $ (4.95 ) $ (1.32 ) $ (6.09 ) $ (2.28 )

Restructurings (Tables)

Restructurings (Tables)	9 Months Ended
	Jun. 28, 2019
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	The following is a summary of the restructuring charges incurred for the three and nine months ended June 28, 2019 and June 29, 2018 under these restructuring plans (in thousands): Three Months Ended Nine Months Ended June 28, June 29, June 28, June 29, Employee related expenses $ 5,135 $ 4 $ 6,742 $ 2,796 Facility related expenses 3,752 98 10,305 3,506 Total restructuring charges $ 8,887 $ 102 $ 17,047 $ 6,302
Summary of Costs Incurred and Remaining Balances Included in Accrued Expenses	The following is a summary of the costs incurred for the nine months ended June 28, 2019 (in thousands): Balance as of September 28, 2018 $ 89 Current period expense 17,047 Charges paid/settled (11,956 ) Balance as of June 28, 2019 $ 5,180

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Jun. 28, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Nonemployees	The following table shows a summary of share-based compensation expense included in the Condensed Consolidated Statements of Operations for the three and nine months ended June 28, 2019 and June 29, 2018 (in thousands): Three Months Ended Nine Months Ended June 28, June 29, June 28, June 29, Cost of revenue $ 651 $ 1,019 $ 2,165 $ 2,881 Research and development 2,517 3,785 6,540 10,422 Selling, general and administrative (353 ) 3,950 11,458 10,792 Total share-based compensation expense $ 2,815 $ 8,754 $ 20,163 $ 24,095
Share-based Compensation, Stock Options, Activity [Table Text Block]	A summary of stock option activity for the nine months ended June 28, 2019 is as follows (in thousands, except per share amounts and contractual term): Number of Shares Weighted-Average Exercise Price per Share Weighted-Average Remaining Contractual Term (in Years) Aggregate Intrinsic Value Options outstanding - September 28, 2018 1,408 $ 32.05 Granted 585 15.44 Exercised (23 ) 2.00 Forfeited, canceled or expired (1,207 ) 35.43 Options outstanding - June 28, 2019 763 $ 14.86 4.30 $ 892 Options vested and expected to vest - June 28, 2019 763 14.86 4.30 892 Options exercisable - June 28, 2019 188 $ 13.11 1.50 $ 706
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	The weighted average Monte Carlo input assumptions used for calculating the fair value of these market-based stock options are as follows: Nine Months Ended June 28, 2019 Risk-free interest rate 2.8 % Expected term (years) 3.91 Expected volatility rate 51.9 % Target price $53.87
Summary of Restricted Stock, Restricted Stock Unit and Performance-based Restricted Stock Unit Activity	A summary of RSAs, RSUs and PRSUs activity for the nine months ended June 28, 2019 is as follows: Number of RSAs, RSUs and PRSUs (in thousands) Weighted- Average Grate Date Fair Value Aggregate Intrinsic Value (in thousands) Balance at September 28, 2018 1,872 $ 34.15 $ 38,452 Granted 2,916 18.18 Vested and released (632 ) 35.43 Forfeited, canceled or expired (743 ) 27.37 Balance at June 28, 2019 3,413 $ 21.74 $ 51,646

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	9 Months Ended
	Jun. 28, 2019
Supplemental Cash Flow Elements [Abstract]
Schedule of Supplemental Cash Flow Information Regarding Non-cash Investing and Financing Activities	The following is supplemental cash flow information regarding non-cash investing and financing activities (in thousands): Nine Months Ended June 28, June 29, Cash paid for interest $ 25,675 $ 21,804 Cash (refunded) paid for income taxes $ (1,713 ) $ 3,435

Geographic and Significant Cu_2

Geographic and Significant Customer Information (Tables)	9 Months Ended
	Jun. 28, 2019
Segment Reporting [Abstract]
Summary of Different Geographic Regions	Information about our long-lived assets in different geographic regions is presented below (in thousands): As of Long-Lived Assets by Geographic Region June 28, September 28, United States $ 114,326 $ 122,888 Asia Pacific (1) 16,820 24,702 Other Countries (2) 8,234 2,333 Total $ 139,380 $ 149,923 (1) Asia Pacific represents Taiwan, India, Japan, Thailand, South Korea, Singapore, Malaysia, the Philippines, Vietnam and China. (2) No international country or region represented greater than 10% of the total net long-lived assets as of the dates presented, other than the Asia Pacific region as presented above.
Summary of Customer Concentrations as Percentage of Revenue and Accounts Receivable	The following is a summary of customer concentrations as a percentage of revenue and accounts receivable as of and for the periods presented: Three Months Ended Nine Months Ended Revenue June 28, June 29, June 28, June 29, Customer A 17 % 14 % 15% 12% Accounts Receivable June 28, September 28, Customer A 23 % 19 % Customer B 13 % 26 %

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details)	9 Months Ended
	Jun. 28, 2019segment
Accounting Policies [Abstract]
Number of reportable operating segment	1

Revenue (Details)

Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018	Sep. 28, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 108,306	$ 137,872	$ 387,460	$ 419,210
Contract liabilities	10,685		10,685
Contract liabilities	2,355		2,355		$ 7,757
Contract liability noncurrent	8,300		8,300
Amounts included in contract liabilities at the beginning of the period	59		7,640
Net change in contract liabilities			$ 2,928
Net change in contract liabilities (percentage)			38.00%
Industrial & Defense
Disaggregation of Revenue [Line Items]
Revenue	46,809	48,399
Data Center
Disaggregation of Revenue [Line Items]
Revenue	17,614	38,911
Telecom
Disaggregation of Revenue [Line Items]
Revenue	43,883	50,562
United States
Disaggregation of Revenue [Line Items]
Revenue	52,340	67,861	$ 185,172	197,540
China
Disaggregation of Revenue [Line Items]
Revenue	27,451	39,016	104,491	115,068
Asia Pacific, excluding China
Disaggregation of Revenue [Line Items]
Revenue	16,371	17,795	60,384	64,028
Other Countries
Disaggregation of Revenue [Line Items]
Revenue	$ 12,144	$ 13,200	37,413	42,574
Industrial & Defense
Disaggregation of Revenue [Line Items]
Revenue			154,563	132,994
Data Center
Disaggregation of Revenue [Line Items]
Revenue			91,518	116,269
Telecom
Disaggregation of Revenue [Line Items]
Revenue			141,379	$ 169,947
License
Disaggregation of Revenue [Line Items]
Net change in contract liabilities			$ 7,000

Discontinued Operations - Addit

Discontinued Operations - Additional information (Details) - USD ($) $ in Millions	May 10, 2018	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018	Sep. 27, 2019	Sep. 28, 2018
Equity Securities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncontrolling interest ownership percentage		20.00%		20.00%
Compute | Equity Securities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment cost basis		$ 36.5		$ 36.5
Noncontrolling interest ownership percentage		20.00%		20.00%
Disposal Group, Not Discontinued Operations | LR4
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payment received for sale of divested business	$ 5
Additional consideration expected to be received		$ 11.9		$ 11.9
Transition services reimbursement to be received		1.5		1.5
Loss on disposal		34.3
Inventory		13.7		13.7
Fixed assets		7.6		7.6
Goodwill		2.6		2.6
Transition services expense		0	$ 0.4	0	$ 0.4
Other receivables net		14		14
Allowance for doubtful other receivables		0.3		0.3
Disposal Group, Not Discontinued Operations | LR4 | Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Service agreement liability		2		2
Disposal Group, Not Discontinued Operations | Customer relationships | LR4
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Intangible assets		27.7		27.7
Selling, General and Administrative | Disposal Group, Not Discontinued Operations | Compute
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Transition services agreement reimbursements		$ 0	$ 1	$ 0.1	$ 3.5
Other Current Assets | Disposal Group, Not Discontinued Operations | LR4
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Additional consideration expected to be received							$ 7.4
Disposal Group, Including Discontinued Operation, Assets, Current | Disposal Group, Not Discontinued Operations | LR4
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Additional consideration expected to be received							$ 4.8
Scenario, Forecast | Disposal Group, Not Discontinued Operations | LR4
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration on sale of business						$ 17.2

Discontinued Operations - Summa

Discontinued Operations - Summary of Operating Results through Dates of Divestiture Related to Divested Businesses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		$ 0		$ 0
Cost of revenue		0		(596)
Gross profit		0		596
Operating expenses:
Research and development		175		4,873
Selling, general and administrative		45		1,560
Total operating expenses		220		6,433
Loss from operations		(220)		(5,837)
Loss before income taxes		(220)		(5,837)
Income tax provision		0		0
Loss from discontinued operations	$ 0	(220)	$ 0	(5,837)
Cash flow from operating activities		$ (29)		$ (10,356)

Investments - Summary of Availa

Investments - Summary of Available for Sale Investments (Details) - USD ($) $ in Thousands	Jun. 28, 2019	Sep. 28, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 100,541	$ 98,697
Gross Unrealized Holding Gains	132	0
Gross Unrealized Holding Losses	(153)	(476)
Aggregate Fair Value	100,520	98,221
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	29,235	28,731
Gross Unrealized Holding Gains	128	0
Gross Unrealized Holding Losses	(120)	(460)
Aggregate Fair Value	29,243	28,271
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	71,306	69,966
Gross Unrealized Holding Gains	4	0
Gross Unrealized Holding Losses	(33)	(16)
Aggregate Fair Value	$ 71,277	$ 69,950

Investments - Change in Availab

Investments - Change in Available for Sale Investments (Details) $ in Thousands	Jun. 28, 2019USD ($)
Movement in Available-for-sale Securities [Roll Forward]
Balance at beginning of period	$ 98,221
Balance at end of period	100,520
Corporate Debt Securities [Member]
Movement in Available-for-sale Securities [Roll Forward]
Balance at beginning of period	28,271
Balance at end of period	$ 29,243

Investments - Summary of Contra

Investments - Summary of Contractual Maturities of Investments (Details) - USD ($) $ in Thousands	Jun. 28, 2019	Sep. 28, 2018
Investments, Debt and Equity Securities [Abstract]
Less than 1 year	$ 73,078	$ 70,200
Over 1 year	27,442	28,021
Total short-term investments	$ 100,520	$ 98,221

Investments - Other Investments

Investments - Other Investments (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019USD ($)investment	Jun. 29, 2018USD ($)	Jun. 28, 2019USD ($)investment	Jun. 29, 2018USD ($)	Sep. 28, 2018USD ($)
Debt Securities, Available-for-sale [Line Items]
Number of equity investments | investment	2		2
Income (Loss) from Equity Method Investments			$ (3,937)	$ (7,241)
Equity Securities
Debt Securities, Available-for-sale [Line Items]
Noncontrolling interest ownership percentage	20.00%		20.00%
Equity Securities | Compute
Debt Securities, Available-for-sale [Line Items]
Investment cost basis	$ 36,500		$ 36,500
Noncontrolling interest ownership percentage	20.00%		20.00%
Income (Loss) from Equity Method Investments	$ 5,000	$ (3,100)	$ (3,900)	$ (7,200)
Equity Method Investments	22,200		22,200		$ 26,100
Preferred Stock | Privately Held Manufacturing Company
Debt Securities, Available-for-sale [Line Items]
Investment cost basis	$ 5,000		5,000		$ 5,000
Other than Temporary Impairment Losses, Investments			$ 0
Compute Business [Member]
Debt Securities, Available-for-sale [Line Items]
Cash consideration on sale of business		$ 36,500

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jun. 28, 2019	Sep. 28, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 100,761	$ 98,474
Total liabilities measured at fair value	7,341	13,714
Contingent consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value		585
Common stock warrant liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	7,341	13,129
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	29,243	28,271
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	241	253
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	71,277	69,950
Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	241	253
Total liabilities measured at fair value	0	0
Active Markets for Identical Assets (Level 1) | Contingent consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value		0
Active Markets for Identical Assets (Level 1) | Common stock warrant liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	0	0
Active Markets for Identical Assets (Level 1) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Active Markets for Identical Assets (Level 1) | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	241	253
Active Markets for Identical Assets (Level 1) | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	100,520	98,221
Total liabilities measured at fair value	0	0
Observable Inputs (Level 2) | Contingent consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value		0
Observable Inputs (Level 2) | Common stock warrant liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	0	0
Observable Inputs (Level 2) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	29,243	28,271
Observable Inputs (Level 2) | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Observable Inputs (Level 2) | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	71,277	69,950
Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Total liabilities measured at fair value	7,341	13,714
Unobservable Inputs (Level 3) | Contingent consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value		585
Unobservable Inputs (Level 3) | Common stock warrant liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	7,341	13,129
Unobservable Inputs (Level 3) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Unobservable Inputs (Level 3) | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Unobservable Inputs (Level 3) | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 0	$ 0

Fair Value Fair Value - Quantit

Fair Value Fair Value - Quantitative Information Used in Fair Value Calculation of Level 3 Liabilities (Details)	12 Months Ended
	Sep. 28, 2018$ / shares	Jun. 28, 2019$ / shares
Contingent consideration | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration timing of cash flows	1 month
Contingent consideration | Discounted cash flow | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration measurement input	0.092
Contingent consideration | Discounted cash flow | Probability of achievement
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration measurement input	0.90
Common stock warrant liability | Black-Scholes model
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding term	2 years 2 months 12 days	1 year 6 months
Common stock warrant liability | Black-Scholes model | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	0.0281	0.0184
Common stock warrant liability | Black-Scholes model | Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	0.607	0.734
Common stock warrant liability | Black-Scholes model | Exercise price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	14.05	14.05
Common stock warrant liability | Black-Scholes model | Stock price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	20.60	15.13
Common stock warrant liability | Black-Scholes model | Dividend rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	0	0

Fair Value - Changes in Assets

Fair Value - Changes in Assets and Liabilities with Inputs Classified within Level 3 of Fair Value (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018
Contingent consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 585	$ 1,679
Net Realized/Unrealized Losses (Gains) Included in Earnings	65	(469)
Purchases and Issuances	0	0
Sales and Settlements	650	(700)
Balance at end of period	0	510
Common stock warrant liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	13,129	40,775
Net Realized/Unrealized Losses (Gains) Included in Earnings	(5,788)	(24,895)
Purchases and Issuances	0	0
Sales and Settlements	0	0
Balance at end of period	$ 7,341	$ 15,880

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jun. 28, 2019	Sep. 28, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 60,958	$ 71,408
Work-in-process	13,949	13,466
Finished goods	35,639	37,963
Total inventory, net	$ 110,546	$ 122,837

Property Plant and Equipment -

Property Plant and Equipment - Components of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 28, 2019	Sep. 28, 2018
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 285,066	$ 278,286
Less accumulated depreciation and amortization	(145,686)	(128,363)
Property and equipment, net	139,380	149,923
Construction in process
Property, Plant and Equipment [Line Items]
Total property and equipment	29,288	49,661
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	172,934	174,638
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	13,449	14,984
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	3,683	2,306
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment	18,616	17,317
Capital lease assets
Property, Plant and Equipment [Line Items]
Total property and equipment	47,096	19,380
Less accumulated depreciation and amortization	$ (4,700)	$ (3,200)

Property Plant and Equipment _2

Property Plant and Equipment - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018	Sep. 28, 2018
Property, Plant and Equipment [Line Items]
Assets held for sale	$ 5,050		$ 5,050		$ 4,840
Depreciation and amortization expense	7,300	$ 7,700	22,400	$ 23,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	145,686		145,686		128,363
Capital lease assets
Property, Plant and Equipment [Line Items]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 4,700		$ 4,700		$ 3,200

Debt - Additional Information (

Debt - Additional Information (Details)	9 Months Ended
	Jun. 28, 2019USD ($)
Debt Instrument [Line Items]
Principle amount	$ 700,000,000
Unamortized deferred financing costs	8,700,000
Term Loans
Debt Instrument [Line Items]
Unamortized deferred financing costs	8,045,000
Debt Instrument, Periodic Payment	$ 1,700,000
Debt Instrument, Payment Terms, Reinvestment Of Divestiture of Business Proceeds, Period	18 months
Debt Instrument, Payment Terms, Reinvestment Of Divestiture Of Business Proceeds, Transaction Completion, Period	6 months
Amount drawn	$ 662,931,000
Effective interest rate	4.69%
Principal balance	$ 674,693,000
Estimated fair value of Term Loans	602,200,000
Revolving Credit Facility
Debt Instrument [Line Items]
Unamortized deferred financing costs	700,000
Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity	160,000,000
Credit facility, remaining borrowing capacity	$ 160,000,000
Federal Funds Effective Swap Rate [Member] | Term Loans
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
One Month London Interbank Offered Rate (LIBOR) [Member] | Term Loans
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
LIBOR Rate | Term Loans
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Minimum | LIBOR Rate | Term Loans
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%

Debt Debt - Schedule of Long-te

Debt Debt - Schedule of Long-term Debt Instruments (Details) - Term Loans $ in Thousands	9 Months Ended
	Jun. 28, 2019USD ($)
Debt Instrument [Line Items]
Principal balance	$ 674,693
Effective interest rate	4.69%
LIBOR Rate
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Margin
Debt Instrument [Line Items]
Basis spread on variable rate	2.44%

Debt - Schedule of Remained Out

Debt - Schedule of Remained Outstanding on Term Loans (Details) - USD ($) $ in Thousands	Jun. 28, 2019	Sep. 28, 2018
Debt Instrument [Line Items]
Unamortized deferred financing costs	$ (8,700)
Current portion	6,885	$ 6,885
Long-term, less current portion	656,046	$ 658,372
Term Loans
Debt Instrument [Line Items]
Principal balance	674,693
Unamortized discount	(3,717)
Unamortized deferred financing costs	(8,045)
Total term loans	662,931
Current portion	6,885
Long-term, less current portion	$ 656,046

Debt - Schedule of Minimum Prin

Debt - Schedule of Minimum Principal Payments under Term Loans (Details) - Term Loans $ in Thousands	Jun. 28, 2019USD ($)
Debt Instrument [Line Items]
2019 (remainder of fiscal year)	$ 1,722
2020	6,885
2021	6,885
2022	6,885
2023	6,885
Thereafter	645,431
Total	$ 674,693

Capital Lease and Financing O_3

Capital Lease and Financing Obligations Narrative (Details) $ in Millions	Dec. 28, 2016	Jun. 28, 2019USD ($)	Sep. 28, 2018USD ($)
100 Chelmsford Street
Capital Leased Assets [Line Items]
Lease term	20 years
144 Chelmsford Street Lease
Capital Leased Assets [Line Items]
Lease term	20 years
Corporate Facility Leases
Capital Leased Assets [Line Items]
Lease term	20 years
Financing obligations associated with leases		$ 28.3	$ 28.3
121 Hale Street
Capital Leased Assets [Line Items]
Lease term	14 years
Capital Lease Equipment [Member]
Capital Leased Assets [Line Items]
Financing obligations associated with leases		$ 1.9	$ 1.2
Discount rate
Capital Leased Assets [Line Items]
Discount rate		0.072

Capital Lease and Financing O_4

Capital Lease and Financing Obligations FutureMinimumLeasePayments (Details) $ in Thousands	Jun. 28, 2019USD ($)
Leases [Abstract]
2019 (rest of fiscal year)	$ 847
2020	3,384
2021	3,304
2022	2,661
2023	2,563
Thereafter	42,247
Total minimum capital lease payments	55,006
Less amount representing interest	(26,433)
Present value of net minimum capital lease payments	$ 28,573

Intangible Assets - Summary of

Intangible Assets - Summary of Amortization Expense of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Finite-Lived Intangible Assets [Line Items]
Total	$ 21,862	$ 21,675	$ 62,189	$ 60,740
Cost of Revenue
Finite-Lived Intangible Assets [Line Items]
Total	8,139	8,594	24,074	24,913
Selling, General and Administrative
Finite-Lived Intangible Assets [Line Items]
Total	$ 13,723	$ 13,081	$ 38,115	$ 35,827

Intangible Assets - Summary o_2

Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 28, 2019	Sep. 28, 2018
Finite-Lived Intangible Assets [Line Items]
Trade name	$ 3,400	$ 3,400
Total	428,952	773,307
Less accumulated amortization	(235,194)	(260,522)
Intangible assets — net	193,758	512,785
Developed technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	179,682	251,673
Less accumulated amortization	(129,100)	(140,000)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	245,870	518,234
Less accumulated amortization	$ (106,100)	$ (120,500)

Intangible Assets - Summary o_3

Intangible Assets - Summary of Activity in Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 28, 2019	Jun. 28, 2019
Goodwill and Intangible Assets [Roll Forward]
Beginning Balance		$ 773,307
Currency translation adjustment		270
Goodwill and Intangible Asset Impairment		344,625
Ending Balance	$ 428,952	428,952
Goodwill [Roll Forward]
Balance at beginning of period		314,076
Currency translation adjustment		611
Impairment of Goodwill		0
Balance at end of period	314,687	314,687
Trade Names
Indefinite Lived Intangible Assets Rollforward [Roll Forward]
Beginning Balance		3,400
Currency translation adjustment		0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		0
Ending Balance	3,400	3,400
Developed technology
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance		251,673
Currency translation adjustment		270
Impairment of intangible assets		72,261
Ending Balance	179,682	179,682
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance		518,234
Currency translation adjustment		0
Impairment of intangible assets	217,500	272,364
Ending Balance	$ 245,870	$ 245,870

Intangible Assets - Summary o_4

Intangible Assets - Summary of Estimated Amortization of Intangible Assets (Details) $ in Thousands	Jun. 28, 2019USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2019 Remaining	$ 12,530
2019	50,330
2020	46,213
2021	33,433
2022	26,048
Thereafter	21,804
Total	$ 190,358

Intangible Assets - Additional

Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 28, 2019	Sep. 28, 2018
Finite-Lived Intangible Assets [Line Items]
Goodwill and Intangible Asset Impairment	$ 344,625
Accumulated amortization	235,194	$ 260,522
Developed technology
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ 129,100	140,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ 106,100	$ 120,500
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years

Impairments - Narrative (Detai

Impairments - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 28, 2019	Jun. 28, 2019
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	$ 217,500	$ 272,364
Technology-Based Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	33,200
2019 Restructuring Plan | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	2,400
2019 Restructuring Plan | Technology-Based Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	3,900
Construction in process
Finite-Lived Intangible Assets [Line Items]
Tangible asset impairment charges	7,100
Zhongxing Telecommunications Equipment Corporation
Finite-Lived Intangible Assets [Line Items]
Tangible asset impairment charges	$ 6,600

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) - $ / shares	Jun. 28, 2019	Sep. 28, 2018	Mar. 31, 2012
Equity [Abstract]
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Class of Warrant or Right [Line Items]
Common stock warrants per share (in usd per share)			$ 14.05
Common Stock
Class of Warrant or Right [Line Items]
Common stock warrants (in shares)			1,281,358

Earnings (Loss) Per Share (Deta

Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Numerator:
Loss from continuing operations	$ (324,714)	$ (85,210)	$ (394,314)	$ (117,647)
Loss from discontinued operations	0	(220)	0	(5,837)
Net loss	(324,714)	(85,430)	(394,314)	(123,484)
Warrant liability gain	(1,927)	0	(5,788)	(24,895)
Net loss attributable to common stockholders	$ (326,641)	$ (85,430)	$ (400,102)	$ (148,379)
Denominator:
Weighted average common shares outstanding-basic	65,858,000	64,920,000	65,555,000	64,598,000
Dilutive effect of options and warrants (in shares)	86,746	0	166,318	600,192
Weighted average common shares outstanding-diluted	65,945,000	64,920,000	65,722,000	65,198,000
Loss per share-basic:
Continuing operations (in usd per share)	$ (4.93)	$ (1.31)	$ (6.01)	$ (1.82)
Discontinued operations (in usd per share)	0	0	0	(0.09)
Loss per share - basic	(4.93)	(1.32)	(6.01)	(1.91)
Loss per share-diluted:
Continuing operations (in usd per share)	(4.95)	(1.31)	(6.09)	(2.19)
Discontinued operations (in usd per share)	0	0	0	(0.09)
Loss per share - diluted	$ (4.95)	$ (1.32)	$ (6.09)	$ (2.28)
Number of antidilutive shares of common stock excluded from the calculation (in shares)	80,046	724,886	129,599	422,584

Restructurings Restructurings -

Restructurings Restructurings - Restructuring and Related Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 8,887	$ 102	$ 17,047	$ 6,302
Employee related expenses
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	5,135	4	6,742	2,796
Facility related expenses
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 3,752	$ 98	$ 10,305	$ 3,506

Restructurings - Summary of Cos

Restructurings - Summary of Costs Incurred and Remaining Balances Included in Accrued Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Restructuring Reserve [Roll Forward]
Balance as of beginning of period			$ 89
Current period expense	$ 8,887	$ 102	17,047	$ 6,302
Charges paid/settled			(11,956)
Balance as of end of period	$ 5,180		$ 5,180

Restructurings - Additional Inf

Restructurings - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 8,887	$ 102	$ 17,047	$ 6,302
Payments for Restructuring			11,956
Ithaca Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	200		5,500
Design Facility Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	(300)		2,500
2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	9,000
Minimum | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Additional restructuring costs expected during the remainder of 2019	2,900		2,900
Maximum | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Additional restructuring costs expected during the remainder of 2019	3,900		3,900
Employee related expenses
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	5,135	4	6,742	2,796
Employee related expenses | Ithaca Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	100		1,500
Employee related expenses | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	4,900
Employee related expenses | Maximum | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Additional restructuring costs expected during the remainder of 2019	2,200		2,200
Facility related expenses
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	3,752	$ 98	10,305	$ 3,506
Facility related expenses | Ithaca Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total restructuring charges			4,000
Facility related expenses | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	4,000
Facility related expenses | Maximum | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Additional restructuring costs expected during the remainder of 2019	1,700		$ 1,700
Other Costs | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 100

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019USD ($)$ / sharesshares	Jun. 29, 2018USD ($)	Jun. 28, 2019USD ($)employee$ / sharesshares	Jun. 29, 2018USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 2,815	$ 8,754	$ 20,163	$ 24,095
Compensation cost not yet recognized	62,700		$ 62,700
Unrecognized compensation cost period for recognition			3 years
Stock option exercises (in shares) | shares			22,795
Intrinsic value of option exercises	100	$ 0	$ 300	700
Granted (in shares) | shares			585,000
Granted (in shares) | shares			2,916,000
Granted (in usd per share) | $ / shares			$ 18.18
Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ (4,700)
Non-option equity units granted (in shares) | shares			748,328
Number of employees affected | employee			13
Incremental compensation cost			$ 8,200
Market Based Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of options granted			7 years
Measurement period for target price per share			30 days
Granted (in shares) | shares			585,000
Weighted average grant date fair value (in dollars per share) | $ / shares			$ 7.47
Aggregate grant date fair value			$ 4,400
Exercise price (in dollars per share) | $ / shares	$ 15.44		$ 15.44
Performance Based Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options canceled (in shares) | shares			1,122,500
Award requisite service period			3 years
Restricted Stock Restricted Stock Units And Performance Based Restricted Stock Units[Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested in period fair value			$ 10,900	$ 19,200
Market Based Performance Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 3,500
Granted (in shares) | shares	200,000
Granted (in usd per share) | $ / shares	$ 17.65
Aggregate grant date fair value	$ 3,500
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of options granted			4 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of options granted			7 years
2012 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Available for grant (in shares) | shares	14,700,000		14,700,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Available for grant (in shares) | shares	3,400,000		3,400,000
Unrecognized compensation cost for Employee Stock Purchase Plan	$ 1,100		$ 1,100

Share-Based Compensation - Effe

Share-Based Compensation - Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Non-Employees (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	$ 2,815	$ 8,754	$ 20,163	$ 24,095
Cost of Revenue
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	651	1,019	2,165	2,881
Research and Development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	2,517	3,785	6,540	10,422
Selling, General and Administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	$ (353)	$ 3,950	$ 11,458	$ 10,792

Share-Based Compensation Share-

Share-Based Compensation Share-Based Compensation Plans - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Jun. 28, 2019
Number of Shares
Beginning Blance Stock options outstanding (in shares)	1,408,000
Granted (in shares)	585,000
Exercised (in shares)	(22,795)
Forfeited, canceled or expired (in shares)	(1,207,000)
Ending Balance Stock options outstanding (in shares)	763,000
Weighted-Average Exercise Price per Share
Beginning Balance weighted-average exercise price per share (in usd per share)	$ 32.05
Granted (in dollars per share)	15.44
Exercised (in dollars per share)	2
Forfeited, canceled or expired (in dollars per share)	35.43
Ending Balance weighted-average exercise price per share (in usd per share)	$ 14.86
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual term options outstanding	4 years 3 months 18 days
Aggregate intrinsic value stock options outstanding	$ 892
Options vested and expected to vest (in shares)	763,000
Options vested and expected to vest (in dollars per share)	$ 14.86
Weighted average remaining contractual term options vested and expected to vest	4 years 3 months 18 days
Aggregate intrinsic value of options vested and expected to vest	$ 892
Options exercisable (in shares)	188,000
Options exercisable (in dollars per share)	$ 13.11
Weighted-average remaining contractual term of options exercisable	1 year 6 months
Options exercisable intrinsic value	$ 706
Market Based Employee Stock Options
Number of Shares
Granted (in shares)	585,000

Share-Based Compensation Shar_2

Share-Based Compensation Share-Based Compensation Plans - Weighted Average Assumptions used for Calculating Fair Value of Stock Options Granted (Details)	9 Months Ended
	Jun. 28, 2019$ / shares
Market Based Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.80%
Expected term (years)	3 years 10 months 28 days
Expected volatility rate	51.90%
Target price	$ 53.87
Market Based Performance Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.90%
Expected term (years)	3 years 3 months 29 days
Expected volatility rate	61.50%

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Restricted Stock, Restricted Stock Unit and Performance-based Restricted Stock Unit Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Jun. 28, 2019USD ($)$ / sharesshares	Sep. 28, 2018USD ($)
Number of RSAs, RSUs and PRSUs (in thousands)
Balance at beginning of period (in shares) | shares	1,872
Granted (in shares) | shares	2,916
Vested and released (in shares) | shares	(632)
Forfeited, canceled or expired (in shares) | shares	(743)
Balance at end of period (in shares) | shares	3,413
Weighted- Average Grate Date Fair Value
Balance at beginning of period (in usd per share) | $ / shares	$ 34.15
Granted (in usd per share) | $ / shares	18.18
Vested and released (in usd per share) | $ / shares	35.43
Forfeited, canceled or expired (in usd per share) | $ / shares	27.37
Balance at end of period (in usd per share) | $ / shares	$ 21.74
Aggregate Intrinsic Value (in thousands) | $	$ 51,646	$ 38,452

Income Taxes (Details)

Income Taxes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018	Sep. 28, 2018
Investments, Owned, Federal Income Tax Note [Line Items]
Income tax (benefit) expense	$ (1,322,000)	$ (9,482,000)	$ 346,000	$ (11,153,000)
Unrecognized tax benefit	1,000,000		1,000,000		$ 300,000
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			700,000
Penalties and interest accrued	0		$ 0		$ 0
Penalties and interest expense	0	$ 0
Effective tax rate			21.00%	24.50%
Foreign earnings repatriated	156,800,000
Transition tax for accumulated foreign earnings	86,700,000
Unrecognized tax benefits that would impact income tax expense	$ 300,000		$ 300,000

Related Party Transactions (Det

Related Party Transactions (Details) $ in Millions	9 Months Ended
	Jun. 29, 2018USD ($)
Cadence | Public Company
Related Party Transaction [Line Items]
Other expense - related party	$ 4.1

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) from Equity Method Investments			$ (3,937,000)	$ (7,241,000)
Unpaid amounts related to purchase of assets			6,200,000	2,800,000
Capitalized construction costs for capital leases			1,500,000	16,500,000
Noncash capital lease obligations incurred			1,500,000	0
Compute | Equity Securities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment cost basis	$ 36,500,000		36,500,000
Income (Loss) from Equity Method Investments	$ 5,000,000	$ (3,100,000)	(3,900,000)	(7,200,000)
Developer Funded [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capitalized construction costs for capital leases			$ 300,000	$ 10,800,000

Supplemental Cash Flow Inform_4

Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information Regarding Non-cash Investing and Financing Activities (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018
Noncash or Part Noncash Acquisitions [Line Items]
Cash paid for interest	$ 25,675	$ 21,804
Cash (refunded) paid for income taxes	(1,713)	3,435
Capitalized construction costs for capital leases	1,500	16,500
Developer Funded [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Capitalized construction costs for capital leases	$ 300	$ 10,800

Geographic and Significant Cu_3

Geographic and Significant Customer Information - Additional Information (Details) - segment	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Segment Reporting [Abstract]
Number of reportable operating segment			1
Revenue | Customer Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	54.00%	59.00%	54.00%	55.00%

Geographic and Significant Cu_4

Geographic and Significant Customer Information - Summary of Different Geographic Regions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018	Sep. 28, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	$ 108,306	$ 137,872	$ 387,460	$ 419,210
Long-Lived Assets by Geographic Region	139,380		139,380		$ 149,923
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	52,340	67,861	185,172	197,540
Long-Lived Assets by Geographic Region	114,326		114,326		122,888
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	27,451	39,016	104,491	115,068
Asia Pacific, excluding China
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	16,371	17,795	60,384	64,028
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets by Geographic Region	16,820		16,820		24,702
Other Countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	12,144	$ 13,200	37,413	$ 42,574
Long-Lived Assets by Geographic Region	$ 8,234		$ 8,234		$ 2,333

Geographic and Significant Cu_5

Geographic and Significant Customer Information - Summary of Customer Concentrations as Percentage of Revenue and Accounts Receivable (Details) - Customer Concentration Risk [Member]	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Revenue
Revenue from External Customer [Line Items]
Concentration risk, percentage	54.00%	59.00%	54.00%	55.00%
Revenue | Customer A
Revenue from External Customer [Line Items]
Concentration risk, percentage	17.00%	14.00%	15.00%	12.00%
Accounts Receivable [Member] | Customer A
Revenue from External Customer [Line Items]
Concentration risk, percentage			23.00%	19.00%
Accounts Receivable [Member] | Customer B
Revenue from External Customer [Line Items]
Concentration risk, percentage			13.00%	26.00%

Uncategorized Items - mtsi2019q

Label	Element	Value
Additional Paid-in Capital [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 1,018,000
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (1,018,000)